I don’t know, it sounds exactly like what a thoughtless troll would do.

So...it makes it worse(for me). Instead of being a stupid and foolish thing he did in the moment of high emotions it just confirms he's an actual Nazi. I'm literally from Oswiecim, used to go past Auschwitz on my way to school every day - the richest man on earth doing sieg heils on stage despite visiting this place is filling me with dread.