There's very few people who are not fascinated by a wild animal that seems to recognize us, and bring us into their world. All Timothy Treadwell is and was is a more heightened and more intense version of that same impulse in ourselves.
That doesn't mean that it's wrong, because that impulse is in all of us. But we need to understand that finally, all that the bear wants to do is be left alone. He doesn't want to be our friend.