There is differences between some follows of religion and others. As a Theology Student who has read the Koran several times, I can tell you it is not based on the Koran, but more about ideology and worldview and not what their religion teaches them. This is why when most Muslims confront terrorist they tell them they aren't Muslims.
For example Westboro Church's stances and action are not built off of what Christianity traditions, scriptures or historical figures taught them but it based on their own twisted worldview and ideology that causes them to protest veteran's funeral and attempted to protest Sandyhook victim's funerals (Happy to say that my home state wouldn't let them get there)
So slamming all of "Religion" is being disagreeable. I think the biggest thing all of us, especially in US right now, needs to judge ourselves on how we treat people we disagree with.