This makes me think "beef" is hardwired into us. I read an article somewhere about how Neanderthals were individually stronger in small numbers susceptible to getting taken over by homo sapiens because the former were more independent and the latter had things like religion to rally around which united them and made them stronger as a whole.
Between Baptists and Catholics for instance. Or between jews and muslims. Etc etc etc. Clashes of religious dogmas have been raging just about as long religions have been around. If I remember correctly, Ancient Egyptians attempted to strike entire dynasties from the record because this Pharoah believed in One God, or that Pharoah moved the capitol too far from more appropriate lands.
There has been history altering levels of "beef" between religious peoples over the millennia.