In Rise and Fall of the Third Reich, William L. Shirer described the night time parade the Nazis held to celebrate the day Hitler was made Chancellor. Three company grade Army officers joined the parade, in full uniform.
In the German Army (as in ours) it was a serious offense for a serving officer to make a public demonstration in support of a political party. But, not wanting to get off on the wrong foot with the new Chancellor, the Gery Army did nothing about this violation of the rules. The first, but not the last time, the Generals tried to trade their integrity for Hitler's approval.
One of the officers who got away with this public demonstration of support for the Nazis was Captain Claus von Satuffenberg.
At some point, didn’t every member of the Wehrmacht have to pledge allegience (unto death) to the Fuhrer?
I am not real familiar with Stauffenburg’s history. However, I believe that while he never joined the NAZI party he was supportive of the NAZI’s untill the Night of Long Knives where the NAZI’s purged a lot of their own membership including some military officers and it became evident just how totalitarian this new regime was going to be. Later he was disturbed by the atrocities that he saw committed on the Russian Front.