Ezra explains it in small words

Uh, if all it took was a law to end hate, we would have passed the "Love Each Other Act" a long time ago.There is no magic spell like that. And laws, like section 13 of the Canadian Human Rights Act, that seek to criminalize "hatred and contempt" actually breed more hatred and contempt, for they compound the feelings of grievance felt by those who are targeted by the law, because the implementation of the law is by necessity so politically biased...

I mean, if a government cared so little for real human rights -- right to life, right to self-defence, mobility rights, property rights, etc. -- why would it suddenly stop to care so deeply for fake human rights, like the right not to have your feelings hurt?

He didn't have an answer, and nor did the other dreamers in the crowd, who are clearly looking for some silver bullet to stop the anti-Semitic hate in the world. They didn't take kindly to being reminded that Weimar Germany had anti-hate speech laws...