The bigoted guys have an utter lack of empathy, compassion and sensitivity. God's chosen people? Well, this concept was invented in the middle east so you know from which country the people claiming to be 'God's chosen people' migrated from.
And in case the bigoted-ones feel they didn't migrate from the Arab world then this makes the caste system a moot point! But I think deep within they know hence the caste system refuses to go away.