It's the statement of a mind that has left reality completely. Like, let's just break down what this troglodyte is really saying here:
The Holocaust isn't real. It was a myth perpetuated by some international conspiracy to make Nazi's look bad. The Holocaust isn't real ergo Nazism isn't inherently genocidal or violent.
BUT... I wish it was real. Meaning he wishes that the violence he denies is inherent to his ideology was actually a real thing.
Cognitive dissonance doesn't even begin to describe what is happening here. Even within the context of this warped worldview some kind of fatal logic error should have prevented the utterance of such a statement. This is beyond believing 2+2=5, it's saying that 2+2=5 while also wishing that two and two made five.
They aren't men, they are broken machines.