In my opinion anyone should be allowed to broadcast their views whatever they may be. I don't care if you're a racist supremacist, a radical islamist, a communist, a centrist. Whatever your view you should be allowed to say it because we live in what claims to be a democratic society which values free speech.
I place little faith in humanity as a whole, however, I feel like if were going to do democracy then we ought to bloody well do democracy and trust that people will look to those with absurd ideas and go "hm, what absurd ideas I shall not vote for them."
The idea that someone's views should be stifled and that they should be censored is abhorrent to me. I also find it insulting that I need these people to be censored for my own protection. I'm perfectly capable of forming my own opinions thank you very much and i do not need you to keep others' from me.
I would also say, if we simply allowed loons to preach then they'd probably get less support. When you censor an opinion it makes it seem dangerous, makes it appear valid and makes it look as though you fear them. However, if we simply ignored those with stupid ideas others would hear them and go "that's bloody stupid."
Oh also, I detest the left/right spectrum but if I had to id probably put myself on the right.