I'll bet they were unarmed and unable to defend themselves against this drugged up public school teenager (Who's parents are registered democrats, no doubt. There's a pattern emerging.)
Allow me to express my condolances to you both for being unable to blame this one on public schools. I know how much it means to you, and the whole “homeschooled kid shoots parents” thing, or “homeschooling mother drowns kids in bathtub” thing is inconvenient for your agenda.
Do you see the problem with rushing to categorize a person before all the facts are in? We shouldn't be doing things like that.
Turns out, this family was quite different than you first believed.