the caste system also is hindu. the caste system oppresses. that's not cool.
i would like to recognize that every ethnicity has had members that have oppressed others. examples: moorish and berber invasion of the iberian peninsula until 732, when martel saved tours through his wall of cavalry turned heavily armored footsoldiers; carthaginian invasion of italy until italy surrendered its northern region and attacked carthage directly, forcing hannibal to retreat; hindu indian oppression of muslims, zen buddhist japanese invasion, rape, incineration, pillage of china... the list goes on, but i'll save you the trouble. here i have given examples of many ethnicities (that aren't caucasian in any way) oppressing others.