The Vedas do not talk about idol worship. In fact, till about 2000 years ago followers of Vedic Religion or Santana Dharma never worshiped idols.+

Hindus assert their religion is monotheistic, even though they honor a number of Gods, including Brahma the Creator, Vishnu the Preserver, and Shiva the Destroyer.  Hindus claim these various Gods are all manifestations of the oneness of the universe.  

Hindu religious practices vary from place to place, but they frequently include yoga, physical and mental discipline to harmonize body and Soul, and ritual bathing. 

Blind belief in multiple Gods, The worship of idols; the worship of images that are not God, the worship of sacred images, ancestor worship, pilgrimage, priestcraft, the belief in avatars or incarnations of God, the hereditary caste system on the grounds that all these lack Vedic sanction. 

Hinduism indulges non-Vedic beliefs such as idolatry, ancestor worship, pilgrimages, priestcraft, offerings made in temples, the caste system, untouchability and child marriages. All these lack Vedic sanction, therefore, Hinduism is not Ancient Vedic religion or Santana Dharma. 

Realizing the universe is created out of single stuff and that single stuff is the Soul which is present in the form of consciousness leads non-dualistic or Advaitic Self-awareness. Self-awareness is freedom or Moksha. Moksha is unity in diversity in the midst of duality. 

Remember:~ 

It is very difficult to talk to people about the ultimate truth or Brahman because everyone thinks he knows the ultimate truth or Brahman. This I know business is dangerous.  And whatever his reached conclusion is second-hand stuff.  Therefore, accepting accumulated knowledge without verification will lead the seekers to hallucinated realization based on the ego.  

One may have some flashes of truth when someone tries to indicate it through fewer words. But it takes nearer to the truth, not realization. 

Advaita is not philosophy. Advaita is the ultimate truth or Brahman or God. The nature of God is Advaita. All the teaching propagated by some gurus are adulterated with theories, tradition, religions are not Advaitic wisdom. Advaita Gnana is Self-knowledge or Brahma Gnana or Atma Gnana. 

Lord Krishna confesses that the oldest wisdom of India (Advaitic wisdom) has been lost: people misinterpret and falsify it today as they did then. It is not yoga but the philosophic truth. But nobody knows it. The teachers of philosophy and leaders of mysticism or religion do not want to inquire into truth and have no time for it. (Gita –Chap- IV-v.2)  

In Advaitic reality, there is neither God nor Goddess, only consciousness.  Consciousness is the real God.  

Remember:~ 

Bhagavad Gita: ~ Brahmano hi pratisthaham- Brahman (God) is considered the all-pervading consciousness, which is the basis of all the animate and inanimate entities and material. (14.27).  

When Bhagavad Gita says God is considered the all-pervading consciousness which is the basis of all the animate and inanimate entities and material then nothing has to be accepted as God other than consciousness a God.  

Religious Gods are not God in truth. One must realize  God in truth. 

Lord Krishna Says Ch ~V: ~ “Those who know the Self in truth.". The last two words (tattvataha) are usually ignored by pundits, but they make all the difference between the ordinary concept of God and the truth about God.  

The dualistic worship of "God” is only for the ignorant populace. The God in truth is only Atman, the innermost ‘Self’. In reality, there is no duality, no differentiation. Only Atman exists.  

Vedas and Upanishad confirm the Soul, the  Self, is present in the form of the Spirit or the consciousness.   

Rig Veda: ~ The Atman (Soul or Spirit) is the cause; Atman is the support of all that exists in this universe. May ye never turn away from the Atman, the Self. May ye never accept another God in place of the Atman nor worship other than the Atman?" (10:48, 5)  

Rig Veda: ~ 'Prajnanam Brahma'- Consciousness is the ultimate reality or Brahman or God in truth.

Do not accept any other God other than the Soul. The Soul is God in truth. Nothing is real but the Soul, which is present in the form of consciousness.

Nothing matters but realizing God in truth. God in truth, is everywhere and in everything. Let these words be inscribed in your subconscious.

God in truth, is hidden by the illusory universe. God in truth alone, is real and eternal, and all else is an illusion.

Brahman is merely a word to indicate the ultimate truth or God in truth. The ultimate truth itself is God in truth.

People are not aware that there is no religious God based on blind faith that exists apart from the Soul, which is present in the form of consciousness.

The Vedas do not talk about idol worship. In fact, till about 2000 years ago followers of Vedism never worshipped idols. Idol worship was started by the followers of Buddhism and Jains. 

There is logic to idol worship. Vedas speak of one God that is the supreme ‘Self’ in i.e. Atman or Soul but Hinduism indulges in worshiping 60 million Gods.    

Remember:~  

Yajurveda – chapter- 32: ~ God is Supreme Spirit has no ‘Pratima’ (idol) or material shape. God cannot be seen directly by anyone. God pervades all beings and all directions. Thus, Idolatry does not find any support from the Vedas.

Yajurveda says if one worships what is not God sinks deeper in darkness: ~ 

Translation 1. 

They enter darkness, those who worship natural things (for example air, water, sun, moon, animals, fire, stone, etc.). 

They sink deeper in darkness those who worship sambhuti. (Sambhuti means created things, for example, table, chair, idol, etc.) ~ (Yajurveda 40:9)  

Translation 2. 

"Deep into the shade of blinding gloom fall asambhuti's worshippers. They sink to darkness deeper yet who on sambhuti are intent.~("Yajurveda Samhita by Ralph T. H. Giffith pg 538) 

Translation 3. 

"They are enveloped in darkness, in other words, are steeped in ignorance and sunk in the greatest depths of misery who worship the uncreated, eternal prakrti -- the material cause of the world -- in place of the All-pervading God, But those who worship visible things born of the prakrti, such as the earth, trees, bodies (human and the like) in place of God are enveloped in still greater darkness, in other words, they are extremely foolish, fall into an awful hell of pain and sorrow, and suffer terribly for a long time."~(Yajur Veda 40:9.) 

So, Yajur Veda indicates that those who worship visible things such as the earth, trees, and bodies (humans and the like) in place of God are enveloped in still greater ignorance,  they are extremely and suffer terribly. 

When the religion of the Veda knows no idols, then why so many Gods and Goddesses with different forms and names are being propagated as Vedic Gods. Why these conceptual Gods are introduced when the Vedic concept of God is free from form and attributes. 

Someone in the past has introduced the concept of God with attributes and attributeless Gods are non-Vedic, because, Yajur Veda says: ~ those who worship visible things, born of the prakrti, such as the earth, trees, bodies (human and the like), in place of God are enveloped in still greater darkness. Therefore, all these add-ons prove that the form and attribute-based concepts are introduced by some sages of the past with a new belief system and code of conduct in the name of Vedas.  

It indicates clearly all the Gods with form and attributes are mere imagination based on the false self.   

Brihadaranyaka Upanishad:~ "He who worships the deities as entities entirely separate from the Self does not know the truth. For the Gods, he is like a pasu (beast)". (1. 4. 10) 

A great majority of Hindus are not in contact with their religious history therefore, they believe their inherited beliefs as the ultimate truth. 

The Bible says: ~ God is a Spirit and they that worship  God must worship God in spirit and in truth. (John 4:24) 

The Spirit is the root element of the universe. The Spirit is present in the form of the Soul, the Self.  

The Soul is present in the form of consciousness. From the Spirit, the universe comes into existence. In the Spirit, the universe resides. And into the Spirit the universe is dissolved. The Spirit is the parent of all that is there is.

Even Brihadaranyaka Upanishad: ~ Brahman (God in truth) is in the form of the Athma, and it is indeed Athma itself. 

Thus, it refers to formless and attributeless God, which is the Atman (Soul), the  ‘Self’ within the false experience. Thus, it indicates clearly all the Gods with form and attributes are mere imagination based on the false self. Thus Atman or Soul, the  ‘Self’ is God in ruth.

There is a clear cut idea of God in the Vedas, Upanishad and Bhagvad Gita. And also there is a clear cut idea of what not to worship as God in place of real God.  Thus, it proves on Vedic perspective the Puranic Gods are not Vedic Gods.

Vedas says never accept another God in place of the Atman nor worship other than the Atman.

That is why Sage Sankara said:~ Talk as much philosophy as you like, worship as many gods as you please, observe ceremonies and sing devotional hymns, but liberation will never come, even after a hundred aeons, without realizing the Oneness.  

The Hindus believed in polytheism, believing all of their Gods to be separate individuals, which were introduced much later by the founders of Hinduism which contains diverse beliefs caste, and creed.  : ~ Santthosh Kumaar