While Luddendorf was certainly in agreement of Hitler's rhetoric re: restoring Germany's former military might, my understanding was that Luddendorf's role in the Beer Hall Putsch consisted of Hitler waving a gun at him, putting him in another room when he refused to join his movement, and announcing to the audience gathered at the Beer Hall that he Luddendorf had agreed to lead the rebellion.
Luddendorf then agreed to it when he saw the support, and the following day when shooting broke out at a police standoff with some couple thousand Nazi's, Luddendorf strode through the volley of bullets to the police line where he surrendered himself promptly.
Or atleast that was the narrative that was presented to me in William L. Shirer's The Rise and Fall of the Third Reich.
It still amazes me today how anyone could walk away from such an incredibly embarrassing failure as the Beer Hall Putsch, but it seems to have been something of an acceptable occurrence at the time. I mean, Hitler often spoke as death as the only alternative to him achieving his revolution, but ran off after the first shot was fired to his country home!
Hitler was even received well when he was tried, and given a very lenient sentence. I guess for Germany coming out of WWI, violence was a far more acceptable and commonplace thing than it is in my world