you have to defend the right to speak
Unless it's hate speech. When you look at what KH, the Daily Hate, sometimes UKIP, sometimes Trump and sometimes the Tories are saying, and you compare it with Nazi propaganda, you can see an awful lot of similarities.
This is why a lot of people are concerned. History is repeating itself. Whipping up anti-'other' sentiment was the forerunner to Nazism. It allowed Hitler to kill 6 million Jews and attack Europe, slaughtering millions more.
You might think it won't happen, and I really fervently hope it doesn't too, but I think vigilance and defending our right to speak out against Nazis and fascism is important too.