My son is a hockey referee, having worked in NC and VA in junior and college games. I am one of a few people who has gone to a game and only cared about the referee. In a nutshell, I once went to games and yelled at refs, now I sometimes go to games and yell at parents and fans yelling at refs.
The reaction to Lucic's hit is evidence of the bias and inability of a fan to objectively look at a hockey play. Both sides, pro-Boston or pro-Buffalo, see totally opposite evidence in the replays of the contact. Like lawyers in a case, some argue law, some argue facts. Both argue only to convince the judge and jury that their party has been wronged and deserves recourse.
Boston fans are arguing that Lucic didn't see Miller, lost the race to the puck and simply was involved in a collision with another player. This is what Lucic has said of the hit. Others argue that the rule protecting goalies outside the crease is a bad rule that should not be in the rulebook. There are arguments defending Lucic in that he did not target Miller's head or that Miller was concussed when his head it the ice. Some are pointing to unpunished similar hits in 2010. Others even argue that Miller is a whiny wimp who drew the hit to get the penalty and the 2 minute penalty given was all the punishment deserved.
Buffalo fans are acting like Buffalo fans. You already know what that sounds like. My fan bias exposed here.
Having watched the replays from multiple angles, multiple times I have my opinion on the hit. (Hint: Multiple offender) But this may be due to my biases which can't be avoided. In the replays I see Lucic with his head up. He clearly sees Miller play the puck in the corner, sets his glide path on Miller and finishes his check with elbows above his head. Some see a good hockey play, some see an intent to injure. I look forward to what Shanahan sees and does.