Allende won with 37% and a 83% turnout, Nixon won with 43% and a 62% turnout, giving Allende 30% of the popular vote and Nixon 27 %.

I'm not sure what this tells us about Nixons right to have Allende deposed though.

I'm not defending Nixon; fuck that guy.

I will, however, say that Allende is oft depicted by the left as some universally beloved leader that only the aristocracy despised. I have not heard this from my (many) Chilean friends (and they aren't part of that aristocracy). Also, it is hard to overthrow a leader when they actually are universally beloved. It happens because the people let it.