Ha. Godwin's law was satisfied right from the start
Well I do know that Hitler was part Jewish, that he was a vegan, had some sort of health issues (he had a private doctor) and conspiracy theorists will tell you he was obsessed with the occult.
Additionally, there is a rather common story (urban legend?) that a soldier in World War 1 had a chance to shoot Hitler (he was a young German soldier at the time) but didn't take it because he had been wounded and the British (I think it was British, though it may have been American, I can't remember right now) soldier thought it wasn't necessary to kill someone who was already out of action.