God and Devil

Since losing faith in all things religious, one of my biggest problems with bible thumpers is that they blame all the world's woes on the devil and give god credit for any and all that just happens to go "right." The problem is, even if it can be "proven" that there is a god, it cannot be proven in any way, shape, form or fashion that there is a separate, independent entity of "evil" parading around causing all the world's problems. Christians can quote the bible all they want, but that doesn't prove there is a devil. And while they're busy quoting the bible, they had best not forget that it is that very book that shows the "devil" can't do anything without god's approval. So even if they can somehow prove that "Satan" exists, the blame still goes all the way to the top.