Of course you've been mad at someone or something before. And you know why of course, "Because he told me this," "Because she dresses like a punk," "Because you don't love me," "Because that nation isn't a democracy."
Aren't these just other ways of saying, "That's not the way I want it, that's not what I expected?"Nuclear wars, dislike for others, true evil all comes from this. It's like saying "I'm better than them, and they should be like me or dead. For a better idea, See also: Don't Drink the Water.