Those, of all political persuasions cheapen what the Nazis did with their crass comparisons to that regime. It cheapens the horrors suffered by the Jews and it’s only done to demonise others and those using it only expose their own narrow mindedness and bias.
Trans people are not going through a genocide like the Jews, the EU is not like Nazi Germany, leaving the EU is not like Nazi Germany, Trump being indicted isn’t like Nazis attacking political opponents, since there is enough suspicion to investigate, government rhetoric about immigrants is bad, but it is not that of Nazis.