What about the freedom of speech? Donald Trump has never instigated violence towards any particular minority ethnic group. He has only proposed to place restrictions upon Muslims and other immigrants entering the United States. A large section of the American population is concerned about the abrupt demographic changes caused by the unlimited immigration. They want this to stop.
Banning a subsect of people from the country counts as hate speech. Freedom of speech is not a universal right. Just as you cannot yell "fire" in a movie theater you cannot say hate speech under the freedom of speech.
He also wants to do other stupid stuff like keeping people from getting vaccinated etc.