When it comes to the U.S. anything goes here comment wise. I am absolutely positive that  a negative comment on China would get deleted before the most vile comment on the U.S.
A few days ago an article ran here with the title something close to "Americans think it's cool to be stupid". Could you imagine them writing something like that about any other citizens? Can you imagine a mainstream U.S. paper writing something like that about anybody?

This isn't 'anti-Americanism' either. It's bigotry. The U.S. is too ingrained in their culture and they are too dependent on the U.S. to dress it up as 'anti-Americanism'.

It's difficult for me to picture how they teach their kids that bigotry is OK if it's directed at Americans.
One of the many ironies of this is that most Americans are not aware of the bigotry.