Donald Trump’s longest-serving chief of staff recently called his former boss a “fascist,” and said Trump wished his generals were more like Adolf Hitler’s generals, but one conservative analyst has had it with tying the former president’s fans to Nazis. Brendan Buck, a former key adviser to ex-House Speaker Paul Ryan (R-WI), appeared on MSNBC Saturday, where he spoke up about what he thinks is an unfair comparison regarding Trump. Buck, a conservative critic of the former president, said Hillary Clinton went too far when she compared Trump’s upcoming rally at Madison Square Garden to a Nazi e…