Yes, you can. In fact, you should. When you let klan members march you gain something important. You get them out in the open and see their true colors. And if you’re a Daryl Davis type, you can change minds and make the world better. By cutting off people you disagree with, you cut off communication. And those people go underground, and get worse. If someone is saying something that is bad how do you expect that to change without discourse? The left used to be able to steelman the rights positions, and walk them to back to a more reasonable position. Now it seems mostly what I see is the left saying, “I’m right, and you need to be cast out of society.” I’m aware there are truly bad actors (Milo Yiannopoulos types) that are just grifters and don’t deserve the conversation. But do you really think that half of America is just grifting? For society to get better, you have to love your enemies too. And the only way to fight bad ideas, is with better ones.