I had thought that the reasons Mormons hated Trump was that he was a thrice married vulgarian and his fued with Romney. But this points out that unlike other conservative Christians, when Mormons hear someone talking about banning Muslims and monitoring their houses of worship, some Mormans think "are we next?"
That has always been obvious. Mormons are a minority, and all minorities, even the ones Trump has not insulted, feel the same here.
I have been frequently citing an apocriphal story about an old Armenian guy, who, on his deathbed, told his childredn to take care of the Jews. When the children asked: "Why the Jews", he responded: "when they are done with the Jews, they will get on to us". It is a very strong sentiment.