Weimar Germany had laws against hate speech!
That they did not apply. They let a guy who tried to overthrow the government free to run for election again. This kind of thing should never be allowed. Someone who physically demonstrates they have no business in a democratic society doesn't belong in it.
How did that end last time? We know where it ends, we know there's nothing redeeming. Nobody needs Nazis, there is nothing to be gained by engaging with them or giving them a platform.