Brahmin was never a caste in the ancient Vedic society, and Chaturvarna was a professional classification and not a caste system as is being projected today.+

Rigveda prohibits ~ “The very concept of castes by birth.  There is hardly any evidence of a rigid caste system in the Vedas. It is argued that the purushasuktahymn of the Rig Veda (X.90) which is often referred to as giving a religious sanction to the caste system was a later interpolation.

The Vedas, however, speak of various classes of people, which appear to have been names of professions, and they were not hereditary.

The very concepts of castes by birth, upper/lower castes, superior/inferior castes, outcastes, untouchables, Dalits, etc. are clearly prohibited by Rig-Veda”.

The caste system which is so integral to Hinduism was also not practiced in the Vedic times.

This accursed hereditary view of caste always has been condemned by Gnanis.

Sage Sankara: ~ The ‘Self has no birth, no death, no caste.

 A Gnani mentally renounces the caste in which he has been born.

Bhagavad Gita says:~

Janma Jaata Shudra Sarve Karmena Brahmanan Bhavati

--This means every person is at a zero level by birth and it is only the deeds of each person which finally make him a Brahmin.

This is why Brahmins are also referred to as Dvija meaning “twice-born”, the first birth being their natural birth and the second one referring to their gaining the “Supreme Knowledge” through the studies of Vedas and becoming a true Brahmin.

Even Bhagavatam 7.9.10 says:~

viprād dvi-ṣaḍ-guṇa-yutād aravinda-nābha-

pādāravinda-vimukhāt śvapacaṁ variṣṭham

If a Brahmin moves away from his Brahminical duties then he is no more a Brahmin. Brahmin is not a birthright, being a Brahmin is a qualification and one has to qualify for that.

In ancient times, knowledge of the Vedas and the performance of Vedic duties made a person Brahmin. 

In Ramayana, Ravana was a Brahmin as he had the knowledge of the Vedas, and also a Kshatriya being a king. So Rama after killing Ravana performs a ritual to get rid of Brahma Hatya Dosha, a curse that comes by killing a Brahmin.

Brahmin was never a caste in the ancient Vedic society, and Chaturvarna was a professional classification and not a caste system as is being projected today.

Terming the original Chaturvarna system as the caste system is like saying that the classification of people as doctors, engineers, and laborers today is a caste system.  

Sage Sankara's in ‘Manisha Panchakam', was inspired by his dialogue with a Chandala, a member of the lowest caste. Once, when Sage Sankara was on his way to the temple after a bath in the Ganga, he found a Chandala with four dogs blocking his path. His caste prejudice flared up when the Chandala refused to step aside and asked him to do so. But the Chandala asked: "If there is only one existence, what is it that you want to drive away: My body or my Soul? If it is my body, both yours and mine are made up of the same physical elements.   

But if it is my Soul, it is also no different from yours. How can, therefore, be any distinctions of caste and creed?" Filled with remorse, Sage Sankara prostrated himself’ before the Chandala. The bard in him sang:- "He who has learned to see one existence everywhere/ he is my master - be he a Brahmin or a Chandala."

There was no hereditary caste system existing during the time of Buddha. Buddha had a magnetic personality that was loved and respected by all. This can be found in all the Buddhist scriptures.

Since Buddhism was a sect of Vedic religion in that era, the Aryan kings highly patronized it by sending their people with Buddhist teachings to different countries. The Brahmins easily accepted the preachings of Buddha.

There was no opposition to Buddhism from anyone. Everybody happily accepted Buddha’s teachings as it was not taken as a new religion but as a segment of Upanishad Vedic scripture.

The Advaita philosophy of Hinduism is Buddhism. If you read the Buddhist scripture, you will understand me better.

Buddha was an avatar.

Ravan was a saint or Brahmin due to meditation and he became Kshatriya or a King by profession in later years.

The word ārya(Pāli: ariya), in the sense “noble” or “exalted”, is very frequently used in Buddhist texts to designate a spiritual warrior or hero, which use this term much more often than in Hindu or Jain texts. Buddha’s Dharma and Vinaya are the ariyassa dhammavinayo. The Truths are called the catvāry āryasatyāni (Sanskrit) or cattāri ariyasaccāni(Pali). The Noble Eightfold Path is called the āryamārga (Sanskrit, alsoāryāṣṭāṅgikamārga) or ariyamagga (Pāli).

Buddhists themselves are called ariyapuggalas (Arya persons). Arya means Aryan and mārga means the path of an Aryan. Those who despise Buddhism are often called“anāryas” meaning not an Aryan.

Sikhism is actually called Santana Sikhi. Sikhism/Buddhism and Hinduism are British names. They are eternal religions with no specific name.

Bhagavad Gita 2:46:~  "A man of true knowledge who has attained enlightenment, has the same use for all the scriptures as one has for a small reservoir of water in a place flooded on all sides."

Sage Sankara strongly advocated the study of Upanishads, and at the same time cautioned that the study of Upanishads alone would not lead to moksha. In matters of such as spiritual attainment one’s own realization was the sole authority and it cannot be disputed

Sage Sankara also said the study of Upanishad was neither indispensable nor a necessary pre-requisite for attaining the human goal, the moksha.

Sage Sankara pointed out; that even those who were outside the Upanishad fold were as eligible for moksha as those within the fold were. He declared that all beings are Brahman, and therefore the question of discrimination did not arise. All that one was required to do was to get rid of ignorance (Avidya or duality).

The seeker's aim is the search for the Ultimate Truth or Brahman.  The search to find the non-dualistic or Advaitic truth that in actuality never was lost, only hidden.

Upanishad aspiration is best expressed in the following sutra:~

OM Asato ma sad gaMaya, tamaso ma jyotir gaMaya, mrityor ma aamritaam gaMaya. Shanti, Shanti, Shanti

"OM Lead me from ignorance to truth, from darkness to light, from death to immortality. Peace, Peace, Peace" (Brhadaranyaka Upanishad. (1/3/28)). 

Upanishads are based on the insights of the sages and seers and serve primarily as a guidebook. One has to accept the Ultimate reality as Brahman or God.

The Sruti itself’ says: "This Atma is NOT to be attained by a study of the Vedas.  (Katha Upanishad I, 2, 23.)     

Sage  Sankar:~ VC- 162: ~  There is no liberation for a person of mere book-knowledge, howsoever well-read in the philosophy of Vedanta, so long as one does not give up the false identification with the body, sense-organs, etc., which are unreal.

Remember:~  

The Book of Manu was made Manu Dharma Shastra. The Book of Manu was a book that originated in India in and around the 9th century A.D. This book of Manu was given a false spiritual interpretation by orthodoxy. And this book was projected as ‘Manu Dharma Shastra’ by orthodoxy. It is the Manu Dharma Shastra that is the foundation and cause for caste discrimination.

The orthodoxy that has taken upon the responsibility to maintain, propagate, and perpetuate the authority of caste discriminating principle is called Manu Dharma Shastra.

This caste discrimination led to umpteen numbers of castes and sub-castes within the Indian population. Today caste discrimination makes the Hindus hate each other, and fight each other therefore there is no unity among the Hindus.

This caste-discriminating tool is used by modern-day politicians to divide and destroy the social fabric of India. The politicians and the orthodox cults preserve and promote Varnashrama Dharma for their own advantage, which is non-Vedic. Orthodox cults and politicians glorify, preserve, enforce, and perpetuate caste discrimination in India.

In the year 1794 A.D. Sir William Jones, the European chief justice of the then-Supreme Court of India at Calcutta, coined the new term Hinduism for the caste-discriminating principle of Varnashrama Dharma originated based on Manu Dharma Śāstra.

(Sir William Jones spent 11 years on the Supreme Court of Calcutta were highly productive ones, and he applied democratic principles to his judicial decisions. The six charges Jones made to the Calcutta Grand Jury during that period helped determine the course of Indian jurisprudence as well as preserve the rights of Indian citizens to a trial by jury, as Jones considered Indians to be equal under the law with Europeans.

His most famous accomplishment in India was to establish the Asiatic Society of Bengal, in January of 1784. The founding of the Society grew out of Jones's love for India, its people, and its culture, as well as his abhorrence of oppression, nationalism, and imperialism. His goal for the Society was to develop a means to foster collaborative international scientific and humanistic projects that would be unhindered by social, ethnic, religious, and political barriers. Through the Society, Jones hoped to make Oriental studies much more attractive to people from the West. As a result, Jones exerted a substantial influence on the academic and literary disciplines in Western Europe. He would remain the Society's president until he died.

In addition to establishing the Society, Jones felt compelled to learn Sanskrit so that he could better prepare himself to understand Hindu and Muslim laws. This led to an enormous personal project: the compilation of all such laws. The task was so huge that he was unable to complete it before he died. However, he did publish portions, including Institutes of Hindu Law, or the Ordinances of Menu, Mohammedan Law of Succession to Property of Intestates, and Mohammedan Law of Inheritance. He also published numerous works about India, covering a variety of topics including law, art, music, literature, botany, and geography.)

The term Hindu religion is totally a new name that cannot be found in any Indian literature before 1794 A.D. Out of the five Indian religions of Buddhism, Jainism, Saivism, Vaishnavism, and Sikhism; Saivism and Vaishnavism were brought under the Varnashrama principle.

After naming the discriminating principle of casteism of Manu Dharma as Hindutva, the religions of Saivism and Vaishnavism, which were enslaved to the caste-discriminating principles, were given a new name as ‘Hindu Religion’! Thus, the Hindu religion is different from Santana Dharma or Vedic religion.

The term Hinduism came into existence under British rule. Hinduism is caste discriminating principle of Varnashrama Dharma based on the Book of Manu.

After 1750 A.D., Europeans captured certain parts of India and started ruling those areas. The capital of then British India was Calcutta the present-day Kolkata.

The Britishers were duty-bound to administer justice to the people living within their dominion. Thus, they set up courts of justice. They needed laws to administer justice through the courts.

To administer justice to the Christian citizens of India living within their dominion, there was Christian Law, based on Biblical principles.

To administer justice to the Muslim citizens of India living within their dominion, there was Islamic Law, based on Quranic principles. But to administer justice to non-Christian and non-Islamic citizens living in British dominion, there was no law book. This created problems for the Britishers.:~Santthosh Kumaar