My personal answer always is, imagine China is really as evil as our propaganda portrays them to be. I have real, super reliable evidence that the US is just as bad or worse. What can I do about China? Absolutely nothing. What can I do about the US? Also not a whole lot to be honest, but when the working class organizes and we have collective power, it obviously behooves us to smash the state that sits over us, and cooperate with its enemies to do so as long as that doesn't compromise our values (which might require questioning if that propaganda was really true in the first place).