There are many sects in most belief systems.
Take the different denominations of the Christian Faith. Then consider Islam, Judaism, Hinduism, and Buddhism.
We also have multiple political belief systems. One in particular is a champion of diversity, while they label their opponents racists.
Republicans are often divided and have multiple factions within their sect. They are accused of being divided.
The democratic sect, on the other hand is normally united. This is odd for a sect that promotes diversity. They are unified in their positions and argue about purity of the faith like ISIS.
Amongst all factions of all sects they are the most doctrinaire. The most unified, the least tolerant, the least diverse.
Hmmmmmmm.