I don't think THIS specific book is probably too dangerous for lefties, but there is another book I'm going to be looking at by Medea Benjamin, & I think I may be able to get into what the dangers are for those of us in leftist spaces who are targeted by foreign propaganda from countries like China & Iran.

Hating the US Empire is totally reasonable. That doesn't mean that you can trust everyone pushing anti-America narratives. I'd hope it would be obvious, but I think there is real danger here.