[Aaron]

I don't think that Mordor was necessarily inspired by the Nazi state. I don't really buy into the notion that Tolkien's work was inspired by Nazi Germany.
In any case, Mordor was driven by the will of Sauron alone. Whereas the Nazi's had a whole system of thought, they weren't brainless savages like the Orcs. No, the scary thing is that many Nazi's were well educated and yet still lowered themselves to such barbarism.