Mordor inspired by Nazi Germany?

[Lalwendë]

I think the only aspect of LotR that you could argue was influenced directly by WWII was the creation of the Fell Beasts (good call, Rumil). I believe there is something in one of the letters about this, about how Tolkien was horrified by airborne warfare - and I understand he was not wholly happy about Christopher being an RAF man, either.

Mordor is certainly run on totalitarian lines, but totalitarianism is not limited to Hitler. It existed before him, it will exist after him.