The generalization you're making is far from true, and with most of the comments you're talking about it's pretty easy to see why they'd get downvoted.

Also - the GP comment was about media and censorship, not China, so if downvoters were reacting to the topic of the comment or to the point it was making, it more likely had to do with that. Downvotes on comments making controversial points about divisive topics are to be expected anyhow.

Weirdly, I don't feel what I wrote was even negative against China.