"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

The religion of the Veda knows no idols

Max Müller says: - "The religion of the Veda knows no idols; the worship of idols in India is a secondary formation, a degradation of the more primitive worship of ideal gods."

In Vedas the God has been described as:- 

• v  Sakshi (Witness) 
• v  Chetan (conscious)  
• v  Nirguna (Without form and properties).
• v  Nitya (eternal)
• v  Shuddha (pure)
• v  Buddha (omniscient)
• v   Mukta (unattached).

It indicates clearly all the gods with form and attributes are not Vedic gods.

Yajurved says:-

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.)

[Yajurved 40:9]

Translation 2.

"Deep into 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:-

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

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.]

 When the religion of the Veda knows no idols then why so many gods and goddesses with different form and name are being propagated as Vedic gods. Why these conceptual gods are introduced when Vedic concept of god is free from form and attributes. 

Some one in the past  introduced concept of god with attributes and attributeless gods, when 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 proves that the form and attribute based concepts are introduced by some sages of the past with new belief system and code of conducts in the name of Vedas.  

Therefore, all the add-ons adulteration  have to be bifurcated to know the true essence of Vedas.