Trade blockade, and food in particular.

Russian farmers will be happy, once in a blue moon.

They are not too unhappy even now.

https://agfax.com/2018/10/12/global-markets-wheat-robust-rus...

American interests

And those are?

Money, keeping China out

Here's a snippet about Africa, I'm sure South America is much more important for the US.

“We will make certain that ALL aid to the region - whether for security, humanitarian, or development needs - advances U.S. interests,” he said, adding that Washington will also re-evaluate its support for U.N. peacekeeping missions.

https://www.reuters.com/article/us-usa-trump-africa/u-s-to-c...

trade, IP, muslim concentration camps, illegal island creation in south China sea, the list goes on.

Xi's power grab is only accepted because life is pretty good right now in China. He won't be able to maintain power over a billion hungry, angry chinese

I have a feeling that Muslim concentration camps is not on top of the list of issues that Trump or Bolsonaro are worried about...

Maybe if MBS starts to care about Uyghurs?

MBS doesn't care about Arabs in Yemen. Why would he start caring about Uyghurs half a continenet away?

Some of them form Salafist militias in Syria.

realpolitik, anything Trump can use to turn the international community against China will be used