I don't think they taught this at band camp:

A Texas high school has apologized after the school band waved a Nazi flag during a performance on Friday, the start of the Jewish New Year holiday of Rosh Hashana. “We had an error in judgment,” band director Charles Grissom told the Dallas Morning News.

Um, Dude, an error in judgement is going golfing on your anniversary or picking a fight with a guy who's 6' 5" with a "kill" tattoo on his forehead. Waving a Nazi flag during a high school game, on Rosh Hoshana yet, is just plain idiocy.