Hate speech is a tricky thing to ban; who decides on what exactly constitutes antisemitism (or whatever)? America has traditionally leaned one way, other nation

Hate speech is a tricky thing to ban; who decides on what exactly constitutes antisemitism (or whatever)? America has traditionally leaned one way, other nations often go the other. I'd love to ban Nazis and hate speech...but I don't trust many people to decide where that line should be drawn.