I am referring more to the elite crowd of yes-men with which he surrounded himself. especially later in the war.

From what I have been told by my family (some of whom were in Germany and Fought on the side of the Nazis), not everyone was aware of the extent to which Hitler was prepared to take the country in order to achieve his goals. His public face differed from that he showed in Private. His public face was that of a much saner person than was his private face.

It was his private world that I am referring to as Insular, based entirely upon the stories I have been told about what it was like to have lived through that time, and which did not make sense to those outside of that world once they became aware of it.

You are correct though, that pretty much all of Germany was behind the man, and cooperated with his goals. I know that my Uncle had not read Mien Kampf until the end of the War, and related that had he (and many of his friends) read it earlier, they might have been more reluctant to support Hitler. He related it to how many people read the Bible. They tend to skip over the bits that conflict with their personal values and only read the bits that confirm what they already believe.