The correspondents dinner where Trump was mocked mercilessly (and justly) by Obama, is indeed thought of by many as one of the main reasons he ran for president. Trump insiders noted that the mockery deeply disturbed him, and changed something in him. It isn’t a wild or “fallacious” theory. Given what we know about Trump and what we have heard from people close to him, it is very likely that the dinner was what pushed him on his path to follow in Il Duce’s footsteps.
Yes, Trump is very much like Mussolini, only those ignorant in history would claim otherwise.