1. Partisan divide is inherent to the yucky part of human nature. I'll leave it at that lest we veer down a rabbit hole of philosophy and religion.
2. Partisan divide can be exacerbated by inflammatory rhetoric that seeks to paint the opposition in the worst possible light instead of treating their (often valid) arguments with charity. When we use words like "all" and "every" and paint the opposition as a monolithic bloc of robotic evil, we're only making it harder to achieve the healing that we need to actually get stuff done. Remember, the more fractured we are as a body politic, the easier it is for any one big player (say, Murray Energy in your example) to drown out everybody else. Thus for both moral and practical reasons, it makes sense to treat others and their arguments with respect, even if we stridently disagree. There are people on this very board (I have a few in mind) who love wild places just as much as you do, but disagree with you on the way that specific parts of our public lands should be designated, used, and/or protected. If you vote all these people off your island, it's gonna be a pretty lonely island - and you'll be no match for the small number of truly rotten powerful players you've mentioned.
And to the extent that you give up on bipartisanship, compromise, and advocate the tyranny of the majority, you've booted me from your side too. But at this point, I'm straying pretty far from discussions of the backcountry itself, so I'll leave it at that. Cheers