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Yes, Trump is a little radical and dumb. He doesn't understand that the smartest thing to do in a liberal country is not to start shouting your radical ideas out, that will almost always give you a nazi or racist title.
I love the example of Hitler. How he didn't just take the charge in Germany, he was actually elected by the German people. And why? Because people wanted a change and they wanted it quick.
The world isn't that much different now with the refugee crisis and near cold war situation between Russia and USA. People are actually believing that those radical ideas are the solution and a easy and fast fix to the world. Therefore I believe that Trump gives absolutely no fucks about being called a nazi or a racist as long as he keeps winning the elections in as many states as possible. None of us could have predicted the success he has had until now.
And what if he doesn't become a president. Then it's Hilary Clinton who is probably going to become one and every single thing she messes up is a win for Trump. Unless Trump gets assassinated or dies to diabetes he will try again in the next presidential elections and then he has even more reasons to mock Clinton for her crappy work.
I don't think anyone can call Trump dumb. Everything he does is completely intentional. Thanks to that he has earned his billions and thanks to that he has had the success in the presidential elections.
EDIT: I forgot to mention before but 14 neo-nazis were elected to Slovakian parliament. In my opinion that shows how far people are ready to go.