FEAR MONGERING and APPEALS TO PREJUDICE
Prejudice is a preconceived opinion that is not based on reason or actual experience. If one had recommended temporarily stopping Muslim immigration before the many and continuing terrorist acts committed by the adherents to Islam had occurred, that would be prejudice. Making such a suggestion following the years of many and continuing terrorist acts committed by this cohort is a proposal based upon actual experience. Fear mongering is the deliberate use of the tactic of exaggeration to alter the perception of the public. Again, if these proposals were made in advance of the many and continuing terrorist acts, such would be a fair claim. However, it is not fear mongering if the actual acts of terrorism have been and continue to be occurring. For example, the German people protesting against the refugee migration following the mass rapes and assaults of New Year's Eve, are not fear mongering or appealing to prejudice, unless of course it is a demagogue casting that claim, as they are responding to actual experience - things that really happened. In the case of Trump, his proposals are responses to the actual experience of the nation. You may dislike the proposed response, however, it is rank demagoguery to call the proposed response fear mongering or appealing to prejudice.