The concept of God has several practical applications. First it supports the idea that there are consistent forces of nature that are within the domain of science. For example the forces of history are consistent but the scientific method doesn't apply because of time scale and other factors. But this encourages a study of history looking for patterns. And while correlation isn't causation, it is still much better than nothing and it makes sense to avoid behaviors common to decline culture and to support behavior common to rising cultures. Of course the cliff notes for this is scripture itself which identifies which behaviors are good and bad.

Another benefit to the concept of God is that it helps one get along with the only people left in the West who aren't scum deserving death. And this is basically traditional Anabaptists and conservative Muslims. Since I believe in God (based on my definition), I can get along with these people. And since all other people in the West are revolting scum, there is no point for me to associate with them.