I think more people have to be hungry, literally, underfed, fearful of where they are going to get food and of where they are going to live. It's so easy to ignore endless atrocities if your family is okay, you have food and you can easily turn away from the violence. Many people in the US have never experienced anything like what has driven most revolutionaries historically.

I think with the right vanguard things could happen though, most people know things are fucked regardless of politics. I have seen a lot of comments on reddit and elsewhere like 'I would fight in a revolution, I'm not gonna start it though'.