The police already killed two suspects a mile, and a half from the shootings, and are still looking for another, so I think your conclusion as well intended as it sounds is erroneous.
Yes I was wrong about one. I now know he was mad because it was a party to celebrate the birth of our Lord and savior. He blew up at the party to let them know his rage and then returned as planned!! This is a religious act and this is a religious WAR!!