The point is to get the idea that China is obviously bad into the minds of most Americans - the ones who aren't paying any attention. Get the MSM to talk vaguely and without evidence of "genocide". So when the topic does come up, the people who DO pay attention (like us) will seem like conspiracy nuts. To people who aren't familiar, you can talk all you want about how Zenz is a crank and how every non-US aligned country has seen what's going on and has signed off on it.... but they're just gonna see our government and MSM saying one thing and then someone else talk about how there's no evidence. And it doesn't matter that you're right, to Americans who don't really care and have vague "China bad USA good" feelings (the overwhelming majority), whatever you say is gonna get dismissed out of hand.

For as much as Americans talk about mistrusting their government and media, I doubt anyone else on the planet just uncritically accept whatever they're told by their government and media.