Trump called fascists "vermin", yet many insist that he is a fascist. Would he call himself "vermin"?The point is, taking a firm stance against illegal immigration doesn't require using language reminiscent of extreme ideologies or echoing phrases/words found in Hitler's speeches.
Only illegal immigrants? His pledge includes rooting out "the communists, Marxists, fascists and the radical left thugs", likening them to vermin who lie, steal, and cheat in elections. Hitler was always using the word "vermin" to dehumanize and vilify certain groups of people (Jews mostly) in his speeches and writings. This, combined with his absurd belief of the 2020 elections being rigged, makes his stance and rhetoric all the more questionable. Not saying he wants to do horrible things like Hitler, but he sure as hell is sounding like Hitler. Trump as a politician, it just comes out the same. Taking the same exact demagogue approach, where you get people fearing others and creating a climate of fear driven politics.
Any form of extremism should be denounced.
If he had not included communists, Marxists, and radical left thugs in the description, as well, the Left would likely not even have mentioned his use of the word.