Why is the caste system a central part of the Hindu religion? There are different Hindu gods for each caste level.
It is a carryover from Hinduism’s roots in the Aryan migration.
It correlates to differing levels of spirituality.
Hinduism states that actions are judged according to caste level.

It is a carryover from Hinduism’s roots in the Aryan migration

Explanation:

The caste system is a class structure which is used to decide where one belongs in the society once an individual is born. Once a child of s born, the child will inherit the caste system of their ancestor.

The caste system which the child inherits will be used in the determination of the child's social class in such society. It should be noted that

Hinduism reinforced the caste system and it was unlikely for individuals to move out of a particular caste system.

It should be noted that Aryanism is the root of Hinduism and therefore, the caste system a central part of the Hindu religion because it is a carryover from Hinduism’s roots in the Aryan migration.

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