Making comparisons to what Hitler did to the Jews diminishes the horror of what happened and reduces your argument into something ridiculous.
Rhetoric matters, but not as an isolated statement made by a foot-in-mouth president. It makes a difference when it becomes a pattern that leads to a rise in nationalism, populism, cultural shifts and actions against vulnerable groups. America’ rightwing and it’s Republican representatives are far from vulnerable.
You want to talk about dehumanizing rhetoric? You might want to get your own house in order Instead of finding yet another rickety cross you can run toward and impale yourselves on (metaphorically speaking).