Despite Matthew Murray's anti-Christian diatribes posted online, his motive for opening fire in New Life Church and its youth group building was clearly something far baser and simpler: revenge. Murray was "asked to leave" the church's Youth with a Mission group for undisclosed reasons before his rampage. He wasn't acting on demonic influences or anti-Christian violence; it was just revenge, the motive for so many mass murderers and a familiar one that crosses racial and religious lines. Murray was, like Robert Hawkins in Nebraska, a typical mass murderer: young white male with a grudge and, it appears, mental problems. I just hope the general public remembers this while the nutjob Christians turn this incident into a rallying point for paranoia that the whole world is out to get them for their godliness. And they will; it's what they do.
An interesting side note: the church security guard who stopped Murray by firing a shot and deemed a hero, was reportedly fired from the local police force for lying during an internal investigation, if I read the bottom paragraph of one of the stories correctly. Another side note: New Life Church was founded by disgraced evangelical leader Ted Haggard, brought down by his hypocrisy and lust for male prostitutes.