I think theists make AF more interesting - There's always room for debate, some will simply quote the bible and I don't like it, others will try to genuinely present a good case for god and religion. It's important to see ideas trough other group's lenses because otherwise you will have a single vision about how stuff works.
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you