St. Hitler is the most lied about man in history, but this is what I read concerning his mustache-
"a recently re-discovered essay by Alexander Moritz Frey, who served with Hitler in the First World War-"Hitler wore the mustache in the trenches because he had been ordered to. The old bushy mustache did not fit under his equipment. In other words, the mustache that defines Hitler was cut in a shape to fit a gas mask. "
Who knows...
Jews obsess over making crap up about him, just like they do about Jesus.