Toward Ecosophy

The specific work I recommend for people in your situation -- and of course it's a fairly common one -- is the journaling exercises of the Order of Spiritual Alchemy, which you can find free for the downloading at the OSA website here. It's my experience that the kind of feelings you're wrestling with have their roots in unresolved childhood experiences, and unpacking and resolving those is essential if you're to get past them and move on. The OSA work isn't religion-specific, and it requires only a very modest amount of time every day, but it's very effective if persevered in.