there r several historians who hav mentioned current shah dynasty's ancestor to b of muslim origins who later converted to hindus, sum khan dudes. obviously they were smarter n cleverer than indegenous natives of west primarily gurung and magar who very easily came under thier influence and became loyal subjects. drabhya shah slained innocent ghale of liglig who were competing to sit in the throne. gorkha, a magar's traditional abode was later on annexed n thus the modern shah dynasty flourished. even thye hav distorted the history of gorkha which says that it was established precisely by hindu rulers as to stop muslim invaders from west. original native khas tribes r of karnali who r inter mingled with magars, close neighbours. they r real thakuris, either a title or distinct race. Shah made thier presence in current east nepal only 200 years ago, before that it was entirely inhabited by kiratis. sum rulers of kirati confiderates were influenced by hinduism n opted to keep one hindu name as well and had hired many bahun priests who betrayed them big time in favour of PNS and received many lands n property of native people, they played an instrumental role of espionage in defeating majh kirat also abode of khambus or rai. pallo kirat or abode of limbus were undefeatable even in seventeen battles, sikkim had supported the limbus. PNS played a cunning strategy of divide and rule policy. later on limbus n PNS made an agreement of ending war allowing limbu autnonomy but loosing the independent soveriegnty. in such complex historical backgrounds n diversityis it is obvious for sum shah kings r god n for sum aggressor n ruthless monsters. for sum a great far sighted king and unifier but for sum just an opportunist wanna b imperialist who was only concerned for territorial gain as to establish real hindustan rather than actual unification of diverse people by heart and soul as propogated by many books. current build ups in nepal r very much self explanatory, itself.