re: #276 Political Atheist

But we agree that some mentally ill people (degree and kind of illness matters of course) must be excluded from gun purchases. Right?

Sure. That’s about ten zillion miles away from “What makes someone a killer”. We wouldn’t allow a paranoid schizophrenic to own a handgun, but a paranoid schizophrenic still has a very low chance of murdering someone— lower then their own chance of being murdered.

You’re talking about two completely unrelated things: disallowing people we know to be severely mentally ill in some way that impairs their ability to use a weapon responsibly, and ‘figuring out what makes someone kill’.