That is historical conjecture that throngs of Nazis in their lederhosen and viener shnitzel bursting at the top of their lungs shouting Heil Schickelgruber! would have ended the Nazi regime in a matter of days. Had Hitler’s name not been changed right before his 18th birthday, it would seem unlikely a name like Schikelgruber to have had the effect to have spurned the Nazis on as they shouted some circus clown’s surname in a war of such ferocity and brutality.
Likewise if Josef Dzhugashvili didn’t shorten his name to “Stalin.”