Hate and radicalization are products of existential purposelessness. You can’t make them go away by preventing existentially purposeless people from talking to each other.
At least you can limit the speed of radicalization. Every village used to have their village loon, he was known and ignored to ridiculed. But now all the loons talk to each other and constantly reinforce their bullshit, and on top of that they begin to draw in the normies.
I see this as an internet analogy.
Does burning a religious book "incite violence" ? It causes it, for sure. Free expression brings about, in the fanatic, a great desire to oppress the speaker. That's why we have such a freedom in the first place.
Without mentioning the oxymoron that lawful free speech is.