Clearly we didn't do enough to grind fascism and Nazism into the dirt back in WWII. Probably shouldn't have supported right-wing regimes overseas during the Cold War and turn a blind eye to the ones at home. Hmm.
Take heart, though, in the knowledge that the forces of hate will ultimately fail. Humanity is growing too close together to allow to remain forever. It's not going to happen overnight and it might not even happen in our lifetimes, but it'll happen and our descendants will look back at what's happening now and wonder why it was ever allowed to happen to begin with.