Just saw this thread. Donitz was shifty and self-promoting like Keitel was with the Army. He was a Nazi because being one furthered his own interests. He was an "old school" German Navy guy when it was to his advantage as well. In the end he stood for everything, and nothing. Hitler appointed him as successor at the very end because there were literally no other senior leaders available (or alive/not on the run) to use instead. No one on the Allied side thought much of Donitz, and the Nuremburg prosecutors didn't even want to waste time on his case.