Am I alone in my cluelessness? Or are there places where it's not an issue? One explanation I read was that it only became a problem as fewer and fewer people were taught classical languages at school, but that's been the case for decades, so I'm not sure why it would suddenly be a big deal in the last ten years or so. Which is apparently the case, though like I said, it's news to me.
ETA: I should add that I do know that X-mas has been used for centuries, and that X is the symbol for the Greek letter Chi, first letter of Christ's name. What I was asking had more to do with how long it's been considered offensive and anti-Christian, presumably by people who have no idea that the X actually refers to Christ.