People (who benefit from imperialism) want a casus belli for their hatred and "authoriarian foreign rulers" and every other piece of propaganda gives them that.

I remember an article around when the Bolivia coup happened that mentioned that some indigenous people who had supported MAS and were beneficiaries of its economic policies to the point that they increased their financial class, had actually started supporting the right-wingers against MAS, who were using the usual talking points about unearned handouts or whatever.

I think there are lots of people who won't visibly support awful politics until they're given encouragement by the ruling class and shown in a "wink-wink" way that they should. A lot of anti-China or anti-anything propaganda does mention how imperialism benefits Americans (our "way of life" under attack, "taking American jobs", violent criminals, "welfare handouts" to immigrants, other fascist type stuff). I think the propaganda that doesn't tie in to people's selfishness may actually be less effective. Really the propaganda seems to try to emphasize the worst in people.

People who imperialism doesn't benefit may parrot those talking points but maybe they're also the least attached to them, and them believing them has the least effect. Someone working in the service industry doesn't affect whether imperialism or anything else goes as planned, someone working for a weapon manufacturer does.

It wasn't jews in Nazi Germany that anti-Jewish propaganda was directed at.