Wrong.
Just as Racism isn't integral part of Christianity, but is nevertheless practiced by some Christians. The caste system is not an integral part of Hinduism but is practiced by some Hindus. Hinduism (the religion) neither approves nor encourages the practiced.
And I know more about Hinduism then you do.
No retard, read the letter of St. Paul, there is neither jew nor gentile in Christianity. There are Brahmins in yours. Stop being in denial about the culpability of Hinduism in creating untouchables, whose existence, according to your own admission is a necessary pre-condition to the existence of Hinduism.