You're reading it wrong, she's stating you can't make a moral equivalence between Obama and, say, Trump or something because supposedly the worst things obama did were silly.
That's not Deng that's Mao and Zhou Wenlai. Mao was even mad that Zhou was getting all the credit for reopening relationships with the west and stuff. By the time Deng was rehabilitated and given more power (by Mao btw) China's foreign policy was already set.
China actually warned Allende to be "careful of counter-revolutionary", and specifically called out the army IIRC, they just didn't break off relations with the country post-coup
You're a child