the history as we read in text books r very much able to answer even though it is highly distorted, manipulated n written in favor of royals n thier people of influences. nepal as we see today was only limited to ktm valley n surroundings, remaining were alien lands, we know who were there n how it was unified. so before 250 years this heteregeneous mixture of population was not is existence. ktm had newars only speaking same dialects, folowing same rituals n religious traditions. current eastern region of nepal was populated by kirats as mjaority, they made thier presence in those lands n brought up civilization of thier own. so ,ancient is thier civilization that even mahabharat has mentioned them. many of them had relation with land n other natural resources which was legitimized in kipat system inscripted in tamropatra issued by prithvi narayn shah made in a treaty n mutual cooperation to assist the unification of nepal beyond sikkim untill it was abolished by mahendra n made mass migration of other ethnics more easier. the mountains, rivers, hills, lakes everyone has local name n many mountains, rocks r termed dieties since ancient times. so, these proves n r evidences of thier being indegenous. the history states same with people of gorkha, lamjung, liglig n others, ie, they were all colonized, before that period it had population of different oirigins yielding the land since time imemorable.it all fits by the definitions.theres no explaining the plight of tharus, they were the worst victimized by this colonist nature of ruling class. the only prob with bahun chettris r they dont hav a region in nepal to claim where they had existence since earliest known history excluding myths. far western regions hav khas tribes but they r reluctant to b incorporated in one n actual khas of karnali r reluctant to include them in. all those aristocrats n elites of nepal hav tied their roots to rajpoots of india, so there u go. the herirarchy of brahmins, khetriyas, sudra n dalits were not originated in any current goegraphic land of nepal. it was doctrinated in muluki ain only at the time of junga bahadur rana based on manu script of hinduism n this was highly unfair n irrevelent to ethnic tribes, this does not exceed couple of centuries. but many tribes hav historical existence since millenium. yes, chettris having khas roots r being reviewed n investigation is going on. these r al about janjatis or indegenous but not only quotas as u level them to b opportunist of. it is only a mechanism to bring them into mainstream n free compitition n merit based selection in nepal is bullshitt, all r influenced by nepotism, source n force.

no doubt about being a nepali n zeal of unity. but ignorance is also worst of all, we can already see the fire burning under these sentiments with unnecessary politicizing.