Free speech does not mean speech with no repercussions. Trump, and you, may say whatever you wish with some very rare exceptions, and the government may not interfere with your speech. However your community may reject your speech as offensive, your family may leave you, your employer may fire you. Understand? You are free to speak, just like the Nazis were free to march in Skokie. And the ACLU will fully defend your right to free speech as they did for the Nazis. Trump's choice to uniformly label Mexican immigrants as rapists etc. has had consequences for him, but his freedom to speak has not been denied. As a matter of fact his position as a Republican candidate for POTUS has greatly amplified his speech and his multiple subsequent opportunities to explain his speech.