Happy Holidays vs. Merry Christmas

So this guy Kirby (who no longer works at Wal-Mart) writes a memo explaining that "Happy Holidays" is going to be the greeting and not "Merry Christmas." He over-justifies the point by using pop history (accurate or not, it doesn't matter) to explain all the different influences that shaped the holiday. I'd love to read the actual email. While I think its proper and inclusive for Wal-Mart to use "Happy Holidays," that has to be one of the stupidest things a customer rep has documented. Wal-Mart caved real quick and came up with a fast apology. You'd think Kirby had killed the tooth fairy or something.