well, the actual caste heirarchy of hinduism doesnt include so called mongoloid nepalese or indegenous nationalities, they were incorporated later by muluki ain drafted at the time of janga bahadur. they r called nationalities becasue they have thier own language, religion, custom n traditional native lands, it also includes khas of karnali n surrounding areas. like of newars n grgs do hav hirerarchy within them which is direct influence of hinduism but thats thier own prob . so, in my opinion it is very wrong to judge n put them them all together in one jar as jaat paat. they r more a nationalities or distinct communities of nepal not mere a jaat paat.  issues of kami damai not being able to touch water or getting beaten up trying to enter temple by so called higher caste is jaat paat to b resolved whihc r still happenin now n again.