Don't get why killing and maiming people gets you all this attention. It is just going to encourage more people on the brink to go and hurt others. Writers who defend with it is what people want to read are trying to avoid responsibility. They have rationalized their actions. Personally, I never want to hear about these two kids again.
They seem to be describing an average Chechen family.
Or so many Russians believe, therefore a growing movement to split Chechnya and Dagestan from Russian Federation and seal it with concrete border like US-Mexico.
What would be the downside of doing this? I'm probably biased (in that of the ~100 Chechens I've interacted with in my life, every single one was a jihadi -- kind of a selection bias, though.)
Assuming Russia could control the pipeline corridors, the only real risk seems to be a "domino theory" that letting a territory go will risk encouraging other, better territories to leave. But in the case of kicking Chechnya/Dagestan out, that's not the risk.
They also have an unique way of avoiding blame for their actions:
Tamerlan obliged with a neat right hook to the other student’s face, according to several sources, for which he was suspended from school for one week.
That's right, you're a boxer, you beat the shit out of a fellow student and what you get for that is a week 'suspension' (or 'vacation') from school you don't care much about in the first place.