I don't think this topic is very new, and all of us will have something to blurt. So, here goes a little thought.
Humanity is divided. Period. The barriers are many ... religion is just one. Some other splitters are gender, wealth, education, ego. One could add many more. Ultimately, it boils down to ME & the rest (not even us & them).
When brothers fight for a piece of the cake, or son kills pop, or a man rapes his wife, or a father rapes his daughter ... Look around and you find the numbers would be very high ... at a global level, it's genocide.
Only spirituality-driven enlightenment can change attitudes. Live & let live.