Graf Stauffenberg was never a supporter of the Nazi regime, but he was a supporter of the national resurgence. He additionally supported some points of the National Socialist politcal programme, for example revocation of the Treaty of Versailles and the call for a great national army, but that went without saying for every career officer in the Reichswehr.Kurt_Steiner wrote:Von Stauffenberg supported the nazi regime in its beginning -as some members of the German resistance did-, but he became an anti-nazi after he saw the horrors of the "Crystal Nacht" in 1938
Graf Stauffenberg had spoken out in favour of a removal of Hitler and his regime long before the war started going bad for Germany. As a professional he was naturally proud and impressed with the success of his nation's armed forces, but the fact that he supported the manner in which some military operations were carried out doesn't mean he supported their purpouse or consequences, the grand strategy or its purpouse and consequences.
Graf Stauffenberg throughout the war tooks appropriate steps and measures to do what he could to resist criminal orders and actions of comrades, superiors and the government or its associated agencies and departments, while at the same time pursuing the meaning of his profession.
No matter where or when during the war he did the best he could to oppose criminal actions and orders with regard to the powers associated to his current posting, starting from his posting as a quartermaster (Ib) with the 1st Light Division in Poland in September 1939 right up to his final posting as Chief of the General Staff of the Reserve Army in Germany in July 1944. That's more than most men of those days can say, without any offence intended towards veterans of similar views as those of Graf Stauffenberg which may be frequenting this forum.
Earlier during the war his rank and positions did not provide him with a good opportunities to act directly against the criminal Führer.
Most people seem to think that he objected to the rule of Hitler and the Nazi government on base of his religious beliefs alone. Nothing could be more wrong. While he considered his beliefs to be somewhat like a part of his business principles, they hardly governed all actions and thoughts of his life, albeit that they added a certain touch.
Graf Stauffenberg opposed the Nazis and their aims also because of his upbringing, his moral and intellectual outlook on life and his environment, his professional competence, his nationalism, etc. You simply cannot explain his resistance to the regime by one word or one phrase. There's more to a man than that.
Technically he was, of course, a traitor. Not much more can be said about that. In his own words he labeled himself a traitor to his government but not to his country. I don't think he was a traitor in a moral sense. He put the needs of his country and its people first and those of its reprehensible regime second.
Being a military officer by profession you are obligated to defend your country, its laws, its people, its culture and so on against anything that threatens to destroy or ruin it, regardless of whether the enemies are foreign or domestic.
On a side note, if resistance towards the 'lawful' government of a nation is always treason and a coup d'etat/uprising/rebellion/revolution is always an unlawful act, the whole American constitution is illegal since the citizens of what now makes up the United States rebelled against their lawful head of state, which at that time was the British king if I'm not mistaken. The same applies to the French constitution, as they once made a revolution against their lawful head of tate, which at that time was the French king.
Face the facts, resistance towards your government is not always treason. If you still think it is, go ahead and consider the ancestors of many a million Americans and French to be traitors. I on the other hand choose not to. To most of those people their ancestors are heroes.
Here's a thread that might be of some interest.