Sorry, totally wrong. They believed Jews were lower than dogs. Nevermind who or what inspired those beliefs. They believed they were superior to other people. These are not rational thoughts.
And Slavic Poles were just a notch above Jews in Hitler's book.
Rational: adjective
definition: using reason or logic in thinking out a problem
The Nazis had a set of defined strategic goals. They applied innovative tactical and strategic developments to achieving those goals. They designed, developed and produced devastatingly effective weapons systems.
QED they were rational.
They were moral monsters, unquestionably. They were arroganty rascist, etc. etc. But the way they went about achieving their goals was highly rational and effective and had the world by the throat for many years.
Stalin was just as much a moral monster, but fortunately for us, he was also rational.
Truly irrational folks - erratic lunatics - do not execute effective military campaigns involving the maneuver of massed armies of hundreds of thousands of men.