i had the same thinking going on lately. I see lots of Nepalis dancing in indian songs, trying to copy salman khan's style and girls wearing salwar kamij and sarees. in usa, yes some Nepalis try to be different than indians because being an indian comes with stigma of having funny accewnt to curry smell and being stingy for some ignorant Americans. but back in Nepal india is major influence. and lots of Nepalis have immigrated from India . we have similar religion and custome. speciallly with internet and bollywood infuence Nepali culture such as gunue cholo, daurasuruwal , dohoree etc are getting less and less popular.. but no matter how close we are with Indians we are still a country and we're not India. and how do you know canadians don't mind when someone just assume them of being American? i think it depends upon person to person.. but i am sure most of them like to be represented as canadians too. but ya, i think we over react when someone assumes us as indian.
I think it comes from the fact that royals trained us to hate india because their power was not secure from the giant country next door and india doesn't seem like a nice neighbour for Nepal like USa is to the Canada  either... i care less tho.. fk it.. if someone tries to make fun of me i'll break their face but if someone bit..ches bout me being an indian in the back.. fk it.. i don't care..
i love indian culture, movies, sweets, most things except for their attitude towards some Nepali by some Indians lebelling as gurkhas and khanchis and the fact that there are thousands of Nepali girls still trapped in india forced to be prostitutes. but other than that India is cool , and i love my neighbour..