Mann himself stated his reasons include being a ‘descendant of European Jews’. I admire his moral conviction. For some people ‘never again’ are life/history/moral lessons learned, rather than mere slogans to be printed on stickers.
All this death and destruction helped along by US tax dollars, and US munitions.
I was not surprised Hillary ‘corporate’ Clinton came out full on pro-death-and-destruction, pointedly criticizing student protesters. It’s decades of failed blank check US foreign policy towards Israel playing out now.