The problem is though mate, he is setting off a process that he may lose control of. He's certainly not a hardened Nazi, but some of te people around him and more importantly some of his base below him are. It's very easy to lose control of events with that context which is certainly the worry.
It's an unpopular opinion, but something similar happened with Hitler. People get carried away, and if you are obsessed with appeasing your base and staying in control it can compel you to perform awful acts.
I know people will cry Godwin's Law with their links between Trump and Hitler, but I feel that you've got a strong point with the idea of events quickly spiralling.
People always appear to have the belief that Hitler and the NSDAP had always planned to exterminate mass groups of people, when the truth is not as simple.
There'll have been those who did and Hitler's anti-Semitic views from the outset can't be ignored, yet moderate-functionalism is now widely accepted by many.
People at the top make statements (racist, xenophobic, militarist etc.), people perceive these in different ways and events can slowly but surely snowball.
This all happens in the name of the person who originally made the statements, however in some cases they have little or no influence in the decision making.
For example, the real architects of the final solution were Heydrich, Müller, Bormann, Klopfer, and Eichmann all working on Hitler's, Himmlers et al. wishes.