Breivik is the exception of mass shooters....he has been determined to be totally sane. He had a motive behind his episode, and it may take fifty years to determine if his theory is correct.
Breivik was a false flag, and it is almost certain what kind of false flag.
The left in Norway was in steep decline when he appeared, and the islamists under pressure from the right/libertarians. Overnight, the right/libertarians became literally hunted. I, myself, had people come on my front door telling me the police would no doubt be on their way. The socialist parties ballooned, and there is NO party anymre - not even the right - without token muslims/muslim kommissars.
You might even see him as test run for the Obamoids.