I’ve often heard it said, most recently in my last reading of “The God Delusion”, something to the effect of “No, religion is not the cause of all violence in the world, but in some parts of the world, religious disputes are the only disputes that exist.”
Something about this always had the ring of error to my ears.
I would go so far as to say that, generally speaking, we are never all that aware of what motivates us to do extreme things when we do them, and the reasons that we give for doing them are usually motives that we “ascribe” our behavior to, rather than being the actual motive for them.
The East/West schism had absolutely nothing to do with whether the Holy spirit proceeded “From” or “Through” the Son, it had absolutely everything to do with who got to say that it did. It was nothing more than the Bishop of Rome claiming primacy and the Eastern Church dissenting.
Indeed, To say that "In some parts of the world, the 'only' reason for the continued violence that exists are religious differences", is akin to saying "In some parts of the united states, the only reason for continued gang violence are the directions 'north', 'south' 'east' and 'west'”.