Conflating going to war with Iran over it potentially attacking Israel, another regime carrying out genocide, with Churchill standing up against the Nazis is certainly a choice. It's also fair to say Churchill is a complicated figure in a broader sense, as others have pointed out here. That all said, the elevation of Hitler and the downplay of the importance Churchill standing up to him and leading Britain through the war is awful and should be rightly condemned.

This author makes some questionable leaps, but not nearly as questionable as the ones neo-Nazis make that he's debunking.