A high school football coach gets suspended a game for posting an inspirational thought over the locker room. He posts a different thought each week. This particular week it was, "Work will set you free," which in the original German (Arbeit macht frei) was the slogan of the Nazi party.
Okay, so it was an honest mistake, and one which the guy apologized for as soon as somebody clued him in. A one-game suspension seems appropriate, and the incident is finished.
But, please: How does an educated adult (who teaches others, for heaven's sake!) NOT know the origin of that phrase?