I'm a very liberal/progressive person. And speaking as one, I find the Mailloux controversy to be completely fabricated and nonsensical.
Yes, what he did was wrong ... And he's already been censured for it in the proper channels. Speaking for myself, I don't consider supplemental vigilante justice to be "liberal/progressive".
While I probably agree, this isn't about our views on the matter. It's about today's reality and sensitivity, you need to understand the times you live in.
It's no different than teams understanding the prototypical enforcer, a la Parros, is no longer part of the game, no matter how much you'd want it to be or not.
Mailloux did something, whether you think it's a big deal or not is pretty irrelevant, what matters is that a lot of people do think it's an issue and it creates a lot of bad press both for him and the team.