For the past four days, several journalists at The Washington Post Montessori School have been doing the Twitter equivalent of hair-pulling, biting, kicking and scratching one another, which started when one of them did the Twitter equivalent of chuckling at a “problematic” joke. By way of comparison, on that same day, several of us at work were telling offensive and profane jokes about a guy we know who stands roughly three feet tall, and somehow we all got on with our lives. Forget education, income, and all those sociological markers; the real divide in the workplace is over humor.