I think one of the major issues is that POC have a lot more to lose if the political system goes completely off the rails even for a short time. Young, white progressives can toy with "revolutionary" ideas in the short term because ultimately they will be fine. If the government defaults because Donald Trump decided to "negotiate" with our debt holders....or if he declares that the Justice Department will no longer investigate urban police departments....or he starts deporting anyone who looks vaguely Hispanic....it's not going to be White Progressives who take the initial hit to the face.