All of these shooters have manifestos that describe how they came to believe what they believed.

> You make it sound it's almost like terrorism didn't exist before the internet.

No, I don't. I specifically said "uptick." This line of argument makes as much sense as showing up in a comment thread about the Capital One breach and saying "You make it sound it's almost like privacy violations didn't exist before the internet." Of course it did, but not at this scale, and we're talking about scale.