Anti-China posts can be racist. If someone is yelling about the Chinese government oppressing people, great.

But it sure does seem like people are out there fomenting FUD about China as China, not really in reference to particular policies or practices that need to change.

For example, in The New York Times's coverage of that time the US decided to try and ban people anywhere selling good GPUs and semiconductor stuff to people in China, it's all about "how effective will this be at preventing China from having things" and "how much will this cost Americans". Not "is this the right thing to do to best stop people in China from being oppressed" or "why should the US be in charge of who can make microchips".

You could say "we think China's government is going to use GPUs to abuse human rights" or "we think if China ever develops a halfway decent semiconductor industry they will immediately invade Taiwan", but often that kind of context seems to have been deemed irrelevant. People are just taking it as read that it is right and proper for the US to decide what industries Chinese people may or may not do, and how good at them they are allowed to be.

And I don't think they'd do that in the absence of racism.