The problem with the tactic of omitting historical revisionism, aside from the fact that the facts are on the revisionists side, is also that the political opposition
won't drop it.
If you're going into a debate on race, you will inevitably have someone bring up the holohoax. What do Greg Johnson and Taylor do in that scenario? If they ignore it, they're bringing a knife to a gun fight, since the system, media, and education system uses the Holohoax to justify all types of repression and unpopular, dangerous policies.
Germans feel uneasy about giving a warmongering, psychopath run rogue state like Israel the ability to launch nukes at Europe with the submarine platform Dolphin II? OY VEY, REMEMBER THE HOLOCAUST! People ask for quotas to be put on the ridiculous and nepotism-tinged admission rate of Jews in Harvard, where 2% of the population makes up 25% of its student body (yet substantially less than 25% of Harvard's Honor Roll is composed of Jews), OY VEY THAT'S WHAT HITLER DID.
Hitler was the last Western leader to stand up to Jews and win. That's why he's demonized. By pretending the Holocaust happened, or worse, picking Churchill over Hitler, you make your cause futile. The results are the same as trying to build an automobile from scratch while ignoring and denouncing every precedent and blueprint ever: You're going to get a box Flintstones car that Jewish Ferrari's will leave in the dust.
Zionism is a violent, genocidal and hateful misappropriation of Fascism and Nazism. It's an expression of the Jew's black and hateful soul. One could argue that it's simply Judaism, as Fascism and Nazism emerged as a response to bolshevism and by extension Jewry.
The political party that Likud emerged from was literally a Fascist one that used Fascist/NS aesthetics, political platform, and tactics. The only difference is Jews are genocidal maniacs and parasites, so they don't share the principle of universal nationalism, nor do they have any concept of ethics (IE, the Jew believes in real racial extermination of, say, Palestinians, which Nazis and Fascists did not believe in as civilized white people).
If Jews organize like Betar, they get Israel and control the world. If Greg Johnson and Jared Taylor are afraid to endorse Hitler, why not the Jews who ripped him and Mussolini off and founded the ruling party of Israel today?