There are many arenas in which Trump's innate fascism is evident, but one of the more conspicuous is in his relationship with the press.  There is a long tradition of antagonism between the press and the people they are covering.  That's as it should be.  The relationship is necessarily adversarial, at least at times.  However, a line is crossed when a public official uses the power of her or his office to impede the press or to punish reporters. As Trump assumes the presidency, he is clearly hovering at that line.  It will be important to notice when he crosses it. When he does, he will have graduated from "semi-fascist" (if that's what he is now) to the real deal (which I think he already is, in most respects.)
I think the Muslim registry is dead in the water, but should that re-emerge, that would be another indicator.