This entire article encapsulates all the things wrong with enforcers and fighting.
What Rinaldo did to Letang was fully justifiable to guys like Prust. Like Rinaldo (whom Prust seems to respect per his tone in the article), Prust thinks that running skilled/star players illegally is OK as it can "swing the momentum of a game". He rationalises it by saying, "golly gee, I need a fight a to swing the game our way but nobody on this team will fight me. What should I do? I know! Run one of their players, illegally if need be! (oh, and players who refuse to fight me are rats and cowards that bring down the game.)"
Which, of course, destroys his entire premise: that fighting keeps the game safe (as fear of retaliation will keep players from seriously hurting each other).
Another thing I find disgusting is that he he thinks fighting someone who delivered a clean hit is OK because he, almighty moron that he is, didn't like it.
Am I against guys standing up for their team mates when justified? **** no (I do feel that scoring a bunch of goals is the best revenge, though). But there is a significant difference between standing up for your team and deliberately making a game dangerous and chippy just to justify your salary.
You know what would really keep the NHL safe? Penalise the teams. If a player does something foolish and gets suspended, the team plays one man short until the suspension ends. Also, reduce the team's cap by the amount the suspended player would have been earning. That will keep the game safe.