that the earth is trying to right itself, despite the blunders of mankind?

I think it's good that you allow yourself time to calm down before doing anything rash. Better to take the high road, even if you decide to leave... it would probably be best to just leave quietly and let them reflect on their own wants or needs.

Who knows... maybe they are on edge because they are trying to right their own ship? Maybe they are defensive because deep down they know they have made mistakes but don't want to admit to it?

Either way, I think we all have to do what we feel is right for ourselves, and let others plot their own course. If that means our paths part, then maybe that is for the best. And who knows, maybe in time something good will come of it all?