Freedom of speech. I also wish theyd arrest the people in KKK, NAMBLA, and many other similar organizations or cults. But think about it. Once a rule is passed to stop these kind of organizations, they can start saying things like “you cant say anything bad about the government or be arrested” or “you cant critisize a religion etc” I believe thats what its like in Canada. Its not perfect, but if they made, say, hate speech illegal, you couldnt say anything bad about homosexuality. Unfortunately, we must keep all viewpoints legal, however awful they are.