"NEVER prevent someone you consider an enemy or a potential enemy a chance to speak. You might learn something that can help you later..."

Yes, indeed! About 40 years ago, my university had George Lincoln Rockwell as a speaker. I went, curious to hear the spewer or the worst kinds of hate in HIS own words. I was quite appalled....then I was extremely appalled as he got round after round of applause & cheers from a fairly large section of the audience.

What I learned was, be VERY careful of who you speak to and what you say to the people around you everyday until you know them, for if they are the sort that would cheer a Nazi, they might do other things.