Human mentality seems to always need a bad guy.
Intellectually, we know cooperation is the key to civilization, working together is the best way to get things done, peace is better than war, and understanding is better than battle. But instinctively we still need every equation to be boiled down to us vs. them, and we cannot conceive of any victory or any win without someone else being destroyed or defeated. And it just so turns out we are always on the side of total good and the other guy is always on the side of pure evil. And so our drive to utterly destroy him is justified.
We’ve never grown beyond the need for a villain in every situation. Will we ever?