This is why leftists tend to win over and over throughout history and then ruin civilizations. The only rightists who win are moderate enough to not squabble, whereas the leftists who win tend to be the most extreme ideologues possible. It's also why Islam is such a shitshow; purity and violence are both core to the religion so there ends up being endless holy wars over just how long a woman's skirt needs to be or which of Mohammed's relatives was the true successor prophet caliph.