I don't think it has anything to do with being like different M&Ms because all M&MS are exactly the same, humans are definitely not! All our different cultures, religions, political and social beliefs, added to our diversity even among people that are similar to us are the reason why it's hard to get along with everybody. We need to stop pretending that we're all the exact same, the human race isn't that clueless.
Not unless you're talking about numbers.