Earlier quoted context omitted.
Though I sometimes enjoy Berry, he's wrong. We can't be 'at war' with nature. We are nature. Human destruction of ecosystems is a natural process - it's not fundamentally different from introduced flora & fauna overrunning island ecologies. It's just happening on a planetary scale. The only 'unnatural' aspect of the picture is the common notion that humans (primates designed for small-scale tribal interactions) could…
I read it more allegorically than that. Being at war with nature is a good metaphor for our behaviour, because we seem determined to completely vanquish it and bend it to our will. Of course it's a bitter irony that if we are at war with nature, we are at war with ourselves (because as you say we come from nature). I think that's implied by the passage. The way we interact with nature is different in kind from other…
We don't 'interact' with nature. There's no getting outside of it to do the interaction. When we 'take more than we need', we're acting exactly as a hominid with tribal cognitive & affective adaptations that have been turned to extended purposes in a global context would act. In other words: evolution in creating H. Sapiens has explored an area of state space that will result in large-scale ecological collapse. This is unfortunate, from our present-day point of view, but it is not unnatural.