Well, this seems to be another one of those arguments about cause and effect (which I have already refuted), but the truth is that it's intended to excuse an act of violence against nonbelievers. This is not a "proof" for the existence of god, but a warning as to what nonbelievers should expect if they dare to acknowledge it publicly.
All the preceding statements and the ones to follow are airheaded rationalizations powered by incredibly lazy thinking and faulty logic. But this one is downright mean-spirited. Any moral person--believer or nonbeliever--should be offended and disgusted.