ok, go back and re-read the comment, there is no denying that we all agree he was born in Lumbini (which is now in Nepal), but does that give us the right to say that he was born in Nepal when the fact is there was no known nation of Nepal at that time per my understanding? i disagree on that account. rest is up to your understanding.

Hypothetical example: If Nepal becomes a part of India or China tomorrow, will your children/grandchildren say that their grandfather is Indian or Chinese? if they do then that would be wrong.