A huge problem is that a lot of poor white folks see attempts to rectify racial or other injustices as a slap in the face, because they see themselves (perhaps correctly) as among the downtrodden. It turns into a battle of comparing wounds. Is a poor white person with no health care and no job prospects living in a dying town better or worse off than an urban black kid who grew up with a broken family in a bad neighborhood surrounded by crime? Are either of these better or worse off than a gay or trans person who's been bullied and ostracized by their community, or a battered wife whose community sides with her abuser, or a woman who was raped and forced to bear the child?

It's very easy for populist demagogue con artists to pit these groups against each other or focus all these groups' anger at one third party scapegoat ("the Jews," "the rich," or some foreign enemy are popular choices) in order to gain power.

A big problem is that real solutions to these problems don't fit nicely into 140 characters. They require that people stop and take the time to understand one another and the historical forces that created their situations, empathize with one another, and find win/win solutions. Populist demagoguery, scapegoating, and totalitarian schemes do fit neatly into sound bites, so they're easier to spread especially in an era of collapsing attention spans.