this is a violent sport and Trouba especially as a defenseman doesn't have to abide by your boy-scout fan logic, he has every right to try and execute those plays just like every other player has the same right. No player in this league should have moral qualms over this, in fact every GM in this league goes out of their way to make sure they can acquire guys like that year in year out, so why are you types so hard-pressed over it?
Where was this bitching when Bennett suckered Marchand just last month or any of the other millions of small dirty plays that get made over the course of an entire NHL season? Why is there so much dog-piling on Jacob? People like you act as though Trouba is the only person in this league that plays the game this way, that he's some enigma and that he doesn't belong in the sport because he "hurts" and he needs to be cast out or exiled. At the end of the day the golden goose Gary doesn't see any of this as a problem, the game is dirty by nature and that will never change.
Players like Trouba will continue on unless you just want to cut to the chase and start advocating for the inclusion of INT rules, which I already know most of you in this thread want to happen anyways and that's why you hate Trouba's hits in the first place.
First it was "he only does it in retribution for opposing players making dirty plays", now it's "he has every right to do it, you boy-scout"? Generally I suggest sticking to just one poorly thought out rationalization at a time, because when you backpedal and goal-post shift that quickly your argument looks pretty weak.
At no point has anyone said Trouba is the only player in the league that has, or is capable of, making dirty plays (hell, you've got another guy on your team we could talk about piling up a pretty historic concussions to games played ratio). That seems more like another attempt to shift the conversation. The problem is Trouba is the one that does it the most consistently and frankly, the most egregiously. You're right about one thing, the league has let it get to this point by not infracting Trouba more often than they have.
I think when the entire league's fans are echoing the same sentiment, you should probably take a little more stock of the situation, rather than just reflexively calling everyone a snowflake boy-scout.