Why only Tibetians? I saw lots of Nepali with last name similar to Indian origin such as sharma/pandey/upadhaya/bhandari/etc (who has a Nepali passport but denies that he/she is from Nepal? They pretend as if they do not know Nepal and get mad or show attitude if you ask them if they are from Nepal.) pretend to be Indian. I have whole bunch of incident when I met with them at office and they disguise that they are from India but there ascent, dress up, attitude are completely Nepali (when asked about India…they even don’t know very very fundamental things). Even several time I asked them: Are you from Nepal? ....Reply is "NO"