[wwalser]

You're responding to points that the author hasn't made. Any time you're writing, you can absolutely not afford to explain to readers all of the things which you are _not_ talking about. You have to rely on a reader's ability to discern that there may well be other valid points besides the one(s) that you're writing about.

> but taking them as a chance to generalize about most boys or even a small percentage of boys seems incorrect.

This points was made in the article. The author points that that boys committing mass killing is extremely uncommon. That most are okay. That nearly all will turn out fine.

That doesn't seem to me to be the point.

> We should be concerned with school shooters, of course

That (it seems to me) is the author's point. That all of the mass killings are committed by men. And since we are concerned with school shootings, masculinity in the context of modernity is one topic worth discussing.

Yes, it's only one topic amongst many. This article isn't about those topics. It's about one of the many topics. We can discuss how the world is getting better all the time (a statement I agree with), in some other article.

[changchuming]

> That all of the mass killings are committed by men.

Should that honestly surprise us? Most killings are done by men. This has been true since time immemorial, going back to the time when we first stepped out of Africa.