Shooting at Robb Elementary School in Uvalde, Texas (19 Students, 2 Teachers Dead)

[JRPGfan]

What in the world, makes a kid... cuz 17 years old, your still a kid, go on a rampage like this?
Also the victims, are surely in no way connected to him, or wronged him anyway?
Like what motive does it take to drive a person to this sort? I cant fathom it.
Just lashing out at random, makes no sense to me.