As if religious belief, unlike depression, typically leads to violence

Anderson Cooper from last night:

Cooper: Do the gunman's parents acknowledge the possibility that their son committing these murders in the name of Islamic extremism? I mean they say it's depressions, but depression doesn't lead most people to kill other people. 

Correspondent: According the the family representative, the parents did say that in their son's weaker moments he did get into "evil ideology and extremist ideas." But they also said they're convinced he never talked to any extremists, never talked to any outsiders about becoming a domestic terrorist. [video]