I'd like to put my two cents into this as I am both a hater of Islam (which stole ~18 years of my life) and also a sympathiser with Muslims being broadly labelled as terrorists.
For starters, this Omar Mateen guy was a mentally-ill fuck-up. The man had problems. He was a closet gay, who had sex with multiple men and drank heavily (doesn't sound too Islamic to me!) I bet you the guy couldn't recite 2 verses from the Quran even if you paid him. He knew jack-all about Islam.
However,The existence of groups like ISIS, Taliban, Alqaeda etc. creates platforms for mentally-ill-fuck-ups like our murderous Omar Mateen to express their hatred through justified means. If Omar was an atheist, his conscience would not allow him to kill so many people, however, because he is led to believe that there is a better place out there in heaven, he carries out his rage with a clear conscience, and THAT is the problem.
Now I hate Islam, I think it's stupid and smart in the same time. I think Muhammad was a prehistoric Steve Jobs essentially who knew how to market "Religion" as opposed to iPhones made by Chinese slaves.
The Muslim community is absolutely sucking ass in its failed attempts to speak out against the atrocities of these few terrorists....simply because they are not united. Everyone is barking up their own tree, divided

.