I feel too tired to take the time to quote specific things to reply to, but I'd like to relate a few things I have been thinking of, regarding Christianity, while reading this thread and before.
I think the biggest problem I have with Christianity lies with the concepts of "the creator" and "the creation", "God" and "his kingdom", "God" and "man". To me all these represent a basic fallacy, because believing in a creator necessarily implies a separation between the creator and his creation. Maybe a connection exists in the sense of a carpenter and the furniture he crafts with his own hands (to give one example), but the creator and the creation still exist as two separate things.
These beliefs seem to completely contradict the animating worldview that everything has spirit, and that the creator of all life IS nature (sorry :-[, but it just expressed my idea so well ). As soon as people separate "god" from the natural world, through the concept of the creator and creation, ruler and kingdom, they begin to lose the perception of spirit ("god") existing IN nature.
How else could we have traveled from perceiving the world as a complex web of relationships between humans, other animals, plants, the wind and mountains, etc, to seeing the world as an inanimate collection of objects for us to use and destroy as we see fit (the civilized worldview, shared by almost everyone in our modern society whether they admit it or not)?
This also paves the way for seeing humans as separate from the natural world as well, through such beliefs as god creating man in his image, and god creating a hierarchy of his creations, with humans at the top. We only lost our relationships with non-human beings once we stopped seeing ourselves as part of the natural world, subject to the same natural laws and forces, the same as any other plant or animal.
I see this perceived duality in the concept of "stewardship"/"caretaker" as well. I see a distinct difference between a caretaker charged with the sole responsibility of "taking care of" the land (as the caretaker sees fit, of course), and a human living in total partnership and equality with all the myriad non-human beings who call the same place home (all collectively working together to take care of their home, with just as much input, participation, and responsibility from the non-humans as from the human, since no difference exists between them).
And I also see this difference in perspectives in indigenous and Christian beliefs about what happens to us after death. Of course countless different indigenous beliefs exist, but many of them share a belief that our (human) ancestors came from animals or at one time were able to shapeshift into animals, and that they exist today in the wind, in other animals, etc (IOWs, in other places and beings in the natural world). Christianity, on the other hand, believes that the spirit departs the natural world after death, to reside in a purely spirit world for the rest of eternity.
Now, individual Christians can choose to believe whatever they wish, and to interpret the Bible and Jesus' teachings however they wish. Christianity (like any religion) means different things to different people, on an individual basis. But I don't believe that that changes the religion's underlying nature, which includes a duality between God and nature/ humans and nature, and a fundamental separation between the two.