What was the general moral belief among German troops during World War II?

I served in the U. S. Army for 27 years, with my service starting with the war in Vietnam and ending with Operation Desert Storm. Since my primary area was Intelligence and Counter-Intelligence, I got to speak with or interrogate soldiers and intelligence operatives (spies, if you will) from many other countries – the Soviet Union, the various countries which were part of the Warsaw Pact (Poland, East Germany, Czechoslovakia, Hungary, Yugoslavia, etc.), Cuba, North Korea, Iraq as well as American allies like England, France, Italy, etc.

The one thing common to just about all was the belief that they were patriots serving their country.

I have no reason to doubt that the average German solider in World War Two felt the same way.