If all the people of the world were the same color and same religion, we would STILL find reasons to hate each other. Our monkey-brains are hard wired for paranoia and extremism. Some worse than others. I doubt mankind will exist long enough to evolve out of that.
I have learned that I am unable to determine who will go out of their way to cause me trouble or harm based upon the color of their skin. I'm white. And I have known plenty of white people I would cheerfully push over a cliff.
There's a saying that goes something like this: "I wish it were so that those who would do me harm walked with a limp. Not so that they suffer, but so that I could see them coming."