It has nothing to do with poverty of imagination and everything to do with black propaganda. The Soviets were simply never evil enough. And we know that looking forward into the future is evil, therefore the Nazis must have been guilty of that crime. If the Soviets had done it, why it may even have rehabilitated that concept. Can't have that, can we?
The problem isn't that Westerners can't imagine themselves in the shoes of the Romantic Nazis. All to the contrary, the problem is that elite conservative Westerners find it ALL TOO EASY to imagine themselves in the shoes of the Romantic Nazis. So much so that they had to safeguard a part of Nazi ideology, to cherish it and safeguard it, by separating it from the Nazis themselves.
The Romantics turned the Nazis into Transhumanists because it fit their own agenda.
Before the Big Bang is beyond the universe. Beyond the universe are other laws of physics. Which laws? All self-consistent laws. What are sets of laws of physics? They're mathematics. What is mathematics? Arbitrary symbol manipulation. And there you've reached a final stopping point. Because it isn't even intelligible to ask why there are symbols or why there is mathematical existence. They are meta-axiomatic, and there is nothing beyond or beneath them. More importantly, there is no meta-level above them because they are their own meta-level.