People show anger out of fear it is th basis for all negative emotions greed, anger , malice, sarrow. Fear of what you believe being wrong causes one to hold to a belief as tightly as possible .
Insecurity of reality is why so many grab something that sounds moral and proper and authoritive and run to the end zone.
No knowledge of self and fear of facing facts about what we are, fuels most religions. Most people spend the whole life running from what they really are in the hopes of finding another truth, one that is more compromising and smaller in breadth and comprehension.
In each of us lies an abyss that is truth , most fear looking to this truth .it is unrelenting and implacable ,infinite and eternal , It's much simpler to look away and follow others as they pat each other on the back for finding God.