Here is my guess, based on years of experience with similar groups, of what is happening.
The government is scared of making a decision and kicks the can down the road.
The indigenous folks don’t want ANY restrictions or regulation.
The commercial harvesters want it all for themselves.
The first is correct. They're cowards, the gov isn't doing their job. It's a disservice to both groups, and has now caused conflict.
I think the last 2 may be slight exaggerations, or applicable to some but not all. The indigenous want the right to fish, but at least the reasonable ones don't want to harvest all the lobster during mating season so there's few left in future years. The commercial harvesters don't want that either.
The indigenous fishers get to start early. They want lots of lobsters before the commercial guys start catching a lot of them. The commercial fishers are PO'd because the indigenous are scooping a lot of them up early, making the commercial fishers lose out AND it also hurts the health of the industry since the indigenous are catching a bunch of the pregnant/spawning lobsters during spawn season when they aren't allowed to fish. The commercial guys then yell "hey this isn't fair!", and then try and contact the gov, and they won't even respond. And then they get fed up and get violent.
You get these disagreements when there's 2 different sets of rules for 2 different groups and then one thinks the other is being treated better than they are.