I don't even understand this letter. Of course Trump's speech is protected. That's not the question here. The question is whether the president's travel ban is motivated by religious discrimination. Donald Trump has provided relevant information to help answer that pressing question. I'm sure Trump stands behind his rhetoric that singles out one particular religion for stigmatization and persecution by him and his Republican party which, as all evidence points to, HAS an official religion--a bastardized version of Christianity--while at the same time forcing bastardized Christianity on everyone else but especially American women. 
Maybe the Republicans and the groper-in-chief should acclimate to accountability. Americans might grow a spine and give Republicans what they deserve. Mind you, I'm not counting on it, but it is possible.