Religions create people which are fragile, agressive, obsessive, narrow-minded, hypocritical (most are unaware of that they are) etc. Thus, they hardly can adopt new ideas, adapt to new conditions. Thus they are open to be (ab)used or (ab)use. Of course education is another case in this matter. If a religious person is properly educated, he he may not have all these characteristics; but can not stand away some of them totally IMO.
And BTW, ok people hurt people, but this is a sort of cycle. There are some things which create people, who hurt people.
I hope, i don't offend any religious person here; cos i have several religious friends that i like very much. But if there hadn't been any religion, things would have been much better for humanity from my point of view.