@laureni, You sounded like lopchan deserved the way he was treated at Delhi airport. And thats your intellectual intention? Good job.. He was just sharing his experience, whats wrong with that? Experience, some are sweet, some are bitter..
Btw, Nepalese do look like indians if they're aryans(not trying to be racist) 
but indigenous people with mongol face, are the most as 'chaukidaar/guards' in India who also are Nepalese. 
In another thread, someone pointed out the fact about Northeastern indian (who looked similar to indigenous nepalese) whom local authority picked on mistakenly. So, yeah. you are a Nepalese and aryan looking, probably you'll go through without hassle but if you look chinky-eyed(no pun intended), short height and with no proper dress, you may probably face some unneeded obstacles.