The rituals mentioned in Karmakanda of Vedas are sought to be negated in the Jnanakanda, which is also part of the same scripture.+

The rituals mentioned in the Karmakanda of Vedas are sought to be negated in the Jnanakanda, which is also part of the same scripture. While Karmakand enjoins upon you the worship of various deities and lays down the rules for the same, Jnanakanda constituted by the Upanishads ridicules worshiper of deities as a dim-witted person no better than the beast. 

This seems strange, the latter part of Vedas contradicting the former part.  The first part deals throughout with karma, while the second or concluding part is all about Jnana. Owing to differing, people have gone so far as to divide into two sections:  the Vedas (that is the first part) to the mean the Karmakanda and Upanishads (Vedanta) to mean the Jnanakanda.

The rituals, which are practiced in Hinduism, are not Vedic rituals and the Puranic Gods are not Vedic Gods.  : ~

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

Bhagavad Gita Chapter:~ All those whose intelligence has been stolen by material desires, they worship many Gods. (7- Verse -20)

Kena Upanishad (6) Chapter I: ~  “That which cannot be apprehended by the mind, but by which, they say, the mind is apprehended-That alone know as Brahman, and not that which people here worship.

Kena Upanishad (7) Chapter I:~  That which cannot be perceived by the eye, but by which the eye is perceived-That alone know as Brahman, and not that which people here worship.

Kena Upanishad (8) Chapter I:~  That which cannot be heard by the ear, but by which the hearing is perceived-That alone know as Brahman, and not that which people here worship.

Kena Upanishad (9)- Chapter I:~ That which cannot be smelt by the breath, but by which the breath smells an object-That alone know as Brahman, and

The Vedas confirm God is Atman (Spirit), the innermost Self.

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 innermost self. May ye never accept another God in place of the Atman nor worship other than the Atman?" (10:48, 5)

Rig-Veda 1-164-46 and Y.V 32-1 clearly mention that God is “One”.

Rig Veda declares God is ‘ONE’ and God is Atman, then why believe and worship in place of the real God.

Brihad Upanishad: ~ “If you think there is another entity, whether man or God there is no truth."

God is not physical. God is present in the form of the Spirit. The Spirit is the cause of the world and the Spirit itself is uncaused.

From the standpoint of the Spirit, the form, time, space, and name are merely an illusion. The spirit alone is real and all else is an illusion.  In reality, the spirit (God) matter (the world in which we exist) is one.

The Bhagavad Gita: ~ Brahmano hi pratisthaham ~ Brahman (God) is considered the all-pervading consciousness (Spirit), 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 (Spirit) which is the basis of all the animate and inanimate entities and material then nothing has to be accepted as God other than consciousness. 

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 are no dualities, no differentiation. Only Atman exists.

Thus, it proves that all the attributed Gods are imagination because their existence is limited to the illusion because only in illusion, there is scope for imagination and diversity. Diversity is merely an illusion. The illusion is created out of a single substance, which is consciousness. Thus consciousness alone is real and eternal.  Thus, whatever is seen, known, believed, and experienced as real within the illusion is bound to be a falsehood.   : ~ Santthosh Kumaar