X is for Xenophobia
“Xenophobia sounds a foul word, you say? Foul it is, sound and meaning both. It’s the tendency to hate and fear those who aren't as you are—those of different races, from different lands, who speak different languages or worship strange gods. It's seen most commonly, I’m told, among Men, although I’ve known a few Dwarves who hate almost all Elves with a passion that is difficult to appreciate until you’ve seen it.
“The epitome of xenophobia, however, occurs in goblins, who hate all others the same. It appears to be a requirement to being an orc, you see.”