This has nothing to do whatsoever with Islam.
http://edition.cnn.com/2016/06/13/us/orlando-nightclub-shooting/index.html
Lol the fucker was suspected of being sympathetic with islamic terrorism
"While the bodies of Omar Mateen's victims were removed from Pulse nightclub overnight, investigators worked Monday to determine what motivated the Florida killer responsible for the worst mass shooting in U.S. history -- a man the FBI knew was sympathetic to terrorism and had previously investigated."
"According to one official, analysis of Mateen's electronic devices showed searches for jihadist propaganda, including videos of ISIS beheading videos and of Anwar al-Awlaki -- an influential American-born imam who worked as a spokesman for al Qaeda in the Arabian Peninsula and was killed in 2011.
"He consumed a hell of a lot of jihadist propaganda" online, the source said."
"During the standoff, Mateen called 911 to pledge allegiance to ISIS. He also mentioned the Boston Marathon bombers."
"But that's confusing because Mateen also claimed connections to other extremists groups, some of which are considered enemies and rivals of ISIS, Comey said.
FBI agents first interviewed Mateen in 2013 after co-workers reported he'd made "inflammatory and contradictory" comments about terrorism. He admitted making the remarks but said he was angry because his co-workers were teasing him because he was Muslim, Comey said."
Yep nothing to do with islam at all.