While I don't condone rudeness about sports (I don't like watching sports, but when my friends and family want to do it I politely watch and listen), politeness about what people love is a two-way street that I understand vividly in my profession: mathematics.

Because if there's anything that people compete to show their ignorance about, it's basic mathematics. I would gladly become a die-hard sports fan if it meant the average person I meet didn't talk they way they do about math.