The fact is, most fans do not watch hockey much. They don't invest in the time to watch hockey games, other than highlights. So they just talk and talk based on a couple of highlights and form their own opinion without regard to the history of how this game is played (and in the case of violence, the changing history of how the game is evolving).
From our perspective, we watched Florida and Tampa going headhunting our players and put them into concussion and bloody faces without getting any suspension, whereas Rielly hardly injured the player and got 5. The frustrating part is, the intent to injure was certainly there in what Bennett and Tkachuk and Kucherov did, but I guess they are so adept at cheapshots that they disguised them in a way that were not suspendible while causing a greater damage to the opposition players. (I rewatched how Kucherov went into Rielly as if he was punching his gloves onto Rielly's face while holding his stick, which was likely what caused Rielly's bloody face). Meanwhile, when guys like Kadri, Bunting, and now Rielly did these acts, they did them with no subtle sneakiness (maybe the Leafs need to take lessons in cheapshots and diving like the way soccer players do) and their highlights then get exponentially scrutinized in the aftermath because they happened in Toronto (all the angst surrounding Kadri and Bunting died after they moved to Colorado/Calgary/Carolina, where they were suddenly transformed from dirtiest players in the world to clean players).
So if the league is really serious in getting rid off headshots and violence, suspend everything at all times, in regular season and playoffs. If people are so concerned about hockey players' healths, why only concerned about regular season games and not playoffs? I'm sure every Leaf fan is all for it as it would only help the Leafs' playoff chances. Unfortunately, this is not truly the case, and become an excuse for the league to institute biases whenever they like.