I also can't get past the viewpoint that "Chara knew exactly what he was doing." Aside from blatant homerism.
I fully expect that players lose their minds in a second or two. That's why the league looks for prior behaviour. Guys with a pattern of losing their minds. These guys are all backwoods hulks from Northern Ontario or Lower Slobovia who never finished high school, and they've been gifted with a lifetime of athletic entitlement. I don't expect them to be the most sophisticated citizens.
But let's be clear, I would not have been surprised at all to wake up today and find on the news that Pacioretty had died.
In which case, if Chara is a guy who, if there are guys in the league who, go out there at practice, scout the rink, and look for spots in which, hey yeah, I can crush a dude's brain right there... that's premeditated murder. Do I think there are murderers in the league, in the sport? No.
If you do, why then is this a sport which you continue to follow?