I heard a quote this week that sums up my fear of organized religion.
"Both sides are yelling, God is great, like God's on their side. Shame on you. We used to be united."
The context--well, does it matter? Pick your region, your tribe, your country. Pick your issue, your rationalization. Pick your century. Pick your god; there are so many from which to choose.
Such a cloak for the exercise of violence, hatred, and conquest is antithetical to greatness, goodness, or even the most modest hope for mankind's future.
Here is a link to the story for source purposes. But before you dismiss it as something that doesn't happen in your backyard, I suggest you take a better look around.