“Ninja?” It’s pretty well a given as fact in self-defense circles that 21 feet or less is deadly range with a knife; see above. “Ninja” skills not necessary.
So you’re now trying to establish a link between “gun nuts” and pedophiles? I can’t see many other legitimate reasons for you to being up that particular comparison.
You don’t have to speculate anything bad about the boy for the shooting to be justified.
Ignore why he was wearing the mask, carrying the knife, and trying to break into the house. Maybe he had a good reason. But being able to protect your sister from knife-wielding intruders is pretty much the best reason to own a gun. Alongside being able to protect yourself from knife-wielding would-be intruders who advance on you outside. So, taking the gun was the right move. And then using it was the right move (with the given information), regardless of the boy’s motivation.
:dubious: We’re speculating about his adopted status because it happened at (IIRC) age 11, not because there’s an automatic “you must be fucked up if you’re adopted” bias. Age 11 adoption gives a lot of opportunities for your birth family to totally fuck you up.
Plus the kid and his sister were both adopted by the school teacher to prevent their being split up and sent to foster homes because their father, who was apparently their custodial parent, was being sent off to prison.
So yeah, the kid came from a background where there appear to have been plenty of opportunities for him to get screwed up.
Plenty of time to have gotten screwed up before or after the adoption. Didn’t Sandusky adopt his favorite victim? Favorite for awhile, 'til he got too old. Didn’t everyone side with the elder Sandusky when his adopted son started acting out? You know, the way those kids from troubled homes do. Poor thing, but you just can’t make a silk purse out of a sow’s ear, can you?
Priests, Boy Scout Leaders, adoptive loved-by-the-community fathers - fits the pattern.