When people say that Trump is a Nazi, they mean in the fascist "enemy from within" type of way. As in they're using Nazi as a drop-in for fascist because Nazi Germany was the most popular fascist nation that everyone knows.
They probably shouldn't do that and should just say fascist.
Yes I guess nazis were the "most popular fascist nation".
Interestingly there were alot of themes in nazi ideology that could almost be considered left-wing.
They believed in the dignity of the German working class man for example and that the Jewish people represented big business and were a corruption on society etc.
Indeed. Their socialist program was left-wing... But it was socialism only for the people they considered actually people. That'd be the key difference between Nazi beliefs and any modern democratic socialism.
New-Left/Progressives are influenced by Carl Schmitt and his views on power that the Right also draws from. It's one of the key distinctions from Liberals who reject him entirely.
They probably shouldn't do that and should just say fascist.