don't think it would have made much of a difference, he should have been shot like in 1934 or 1939 at the latest - always had difficulties to really appreciate the Stauffenberg group, i mean, they died for what was essentially a good thing, but i don't think they (mainly) did it for the right reasons (stop the holocaust, prevent ww2 from happening); it was rather that they were shocked at how madly hitler organized his war (a thing which shouldn't actually suprise anyone who heard hitler talk for more than 30 seconds - the guy was obviously mad)