I watched this and couldn't help thinking he was mentally unbalanced.
He reminded me of jacko at times, that blind sense of the world can be full of love and innocence.
What made me laugh was the rants on 'protecting the bears' but when the poachers showed up and threw rocks at the bears he hid in the bushes nearly crying? Then turns into Johny concrete on camera ranting at the rangers.
He clearly felt intimidated by civilisation and the wilderness was somewhere he could not be judged, the animals didn't take a view on him.
He seemed to believe that he would not be attacked by the bears and that he could scare them off if they became agressive and remain in control.
IMO he is the sort that causes more harm than good by make bears less wary of humans and less bothered by them being near by.
He may have wanted to be one of the pack, but even if he hadn't died the way he did ie for food, he would have eventually been challenged, bears may be able to survive a one on one brawl, a human tussing a 12 ft bear is pretty much spent from the off unless he is the technoviking in which case the bear would make a nice winter coat.
The irony for me was that he carried no weapon - gun, yet had he had a gun, he may have survived the attack, he didn't and died as a result, yet the bear died at the hands of man because of him anyway.