When it comes to genocide there is a lot of resistance to believing that such things have happened. This true of all genocides to my knowledge, and the holocaust is still denied by many. Holocaust documentaries and films attempt to get the message and the truth of it across, but people still don't want to believe that we are capable of this. Then we don't want to believe most Jews slaughtered in Germany are pacifists. They are slaughtered in Germany both because they are a political obstacle and because they are not a physical threat to Hitler. He knows they will not take up arms and resist, and they never do. Some escape, but many just hope and wait for everyone to wake up, but people don't. Nobody saves them. This is the ultimate insult both to the goal of the Jews and to humanity itself. It is the worst truth, the most unsettling to mothers and fathers and all of us. Germany is a modern, progressive forward thinking society, but this happens there. The Germans invent science fiction. They are the center of world culture, but this happens anyway.
Some also search for excuses for genocides like "The Jews must have provoked it" Excuses R us is a feature of the post holocaust era. Sometimes it takes monumental effort to bring people to the table to even accept that the holocaust has occurred. That is why I say it is trivial if some Jews somewhere in Germany do support Hitler. Its not something I expect to see discussed in most documentaries about the Holocaust or about the war. Its a history book thing. Its not a secret but is a detail along with thousands of other details that are not presented in mass media.
Denial is something that can be found in any political group.
As I have said before, Holocaust denial is a terrible thing. It's something malicious.
But there are also people who engage in denial about other inconvenient truths, concerning the
Nazizeit (the Nazi decade): one is , for example the Haavara agreement, that was a treaty signed by Nazi Germany and the Zionist Movement of Israel, thanks to which many Jews could move to Israel and settle down there, transferring a portion of their assets to the Anglo-Palestine Bank.
Or the fact that the banking dynasty Warburg practically owned the IG Farben, which was at that time, the biggest chemicals firm in the world, and built the largest industrial (petro-chemical) complex in the world: Auschwitz. And the IG Farben did know what kind of slaves they were using as workforce between 1940 and 1945.
There is denial everywhere: I see WW2 just as a horrific war between banking dynasties that wanted to seize the oilfields, the natural resources of all of Europe.