I just stated that I agree that humans have historically used religion as one of many reasons for justifying their actions.
As tesseract's post suggests, blaming religion for all of it is silly, and there must be a deeper cause. I believe it is the nature of man. When you look at deliberately irreligious societies historically (such as revolutionary France and the communist regimes of the 20th century) things don't seem to get much better. In fact, they get worse.
That's the same silly argument the gun nuts in the US justify the right to bear arms, "religion doesn't hurt people, people hurt people".
"Worse"? You might wanna have a look at some religious states throughout history and in fact even now in the middle east, then recalibrate your definition of "worse"
And citing tesseract as back up is very sad indeed