You can make yourself feel better about yourself if you project your shadow side, if you project your own potential for evil onto someone else. By annihilating them and, therefore, your shadow, you bring yourself into some state of purity or reformation.
“It's not a slam at you when people are rude, it's a slam at the people they've met before.”
“It's a wonderful world. You can't go backwards. You're always moving forward. It's the wonderful part about life. And that's terrific.”