Yes, and the crazy people are the ones who, when desperate and angry, try to kill 3 innocent people and then themselves.

I don't understand the equivocation here. It seems a symptom of the broad inability in modern social thinking to pin any responsibility on individuals. While this stems from our desire to root out systematic issues, which is necessary and important, it should not be the only thing we care about.

In fact, a culture of individual responsibility actually can become a deep feature of our society if we take the time to engender it.

Talking about individual responsibility is not ignoring the systematic issues in society, because a lack of focus on individual responsibility is actually rooted in our culture and hence is a systemic issue in itself.