I tried to write a genuine ELI5 explanation but I'm not sure it's possible unless you can assume a five-year-old knows what "philosophy" means, lol. You could

I tried to write a genuine ELI5 explanation but I'm not sure it's possible unless you can assume a five-year-old knows what "philosophy" means, lol. You could say "a group of people think that being smart gives them magic powers, and that most people are evil zombies, but they think everyone in their own special group is good and can do whatever they want" but you lose a lot of nuance.