Get in there and push back against China Bad propaganda.
/r/UrbanHell is one of the better places to push leftist messages on reddit. It's big (600,000+ subscribers) but most comment sections are manageable, and housing conditions/urban development is so fucked up in much of the U.S. that you can find a pleasant amount of support for public housing efforts, even in AES states. "These big scary AES states actually give a shit about their people" is also a great way to get people to question how scary leftism actually is.
Europe is generally marching in step with the US narrative on Xinjiang. The EU have sanctioned Chinese officials. They dumped 5G when the US came knocking. They suspended the CAI agreement.