then we must use reason to dispel the fear.

Sort of. Such fears are being driven by emotion, in the main, and emotion doesn't really respond to reason very well. And it responds really badly to being shouted at. But is you mean we act in a way that shows there is no reason to fear, I'd agree.

And as for what banners are shown at what events: I have been to quite a number of rallies and things that made the news. It is always worth remembering that what is shown is the decision of the film makers and editors and may not fully reflect what was there. Maybe it does, maybe not. I don't have the information to say in this case. Same with talking heads and facebook pages. The loudest voices are not always the most representative.