Readers who are not from Indian subcontinent may find this difficult to understand or beleive, let me throw some context. Indian caste system is probably the longest running abuse,racism, human rights violation in the human history. Even,now in some parts of the country people from lowest caste are made to carry human waste on their head[0]. After independence,thanks to rights offered by constitution & reservation by…
Is the religious component that large? I'd assume that it's simple ingroup/outgroup, like most discrimination.
You don't need to believe that your group is special by divine ruling, you just need to believe that you'll get a better personal outcome if you strengthen people that are like you, as they'll hopefully do the same for you.