@dindukhi, south asian muslims have proper castes like hindus.there are the ashraf(elite; claiming arab,central asian, persian and pathan castes) and ajlaf( the hindu local converts).the only thing they do commonly is pray in mosque.
also the anglo-indian christians of india,pakistan and sri lnka are the elites and dont touch or marry or live with the low caste indin converts.they even have separate graveyards like the ashraf muslims.
the sikhs have jat and khatri elites who re the ruling elite in punjab and foreign diaspora,the low caste converts are called majhabi sikhs and are still untouchable.they even have separate gurudwaras.
-i am against every kind of segregation to any caste or foreigners in temples. but thats also true for lots of jewish,parsi and muslim holy sites.