I debate these things anyway, even when it's futile, because the debates entertain me. But the difficulty I have is that it's hard to know how best to respond from a nonreligious standpoint. We nontheists feel the existential gravity of all our decisions more deeply, because we don't trivialize life by personifying ultimate reality like the theists do. So the weight of our decisions is all on us, as the existentialists say.

There are many ways to respond to a religious person, especially if you've studied the issues a lot and you know how to write, and so on. You have to pick one of those ways and run with it, even when there's no guarantee it will work as you intended. It's the freedom that's an existential problem, whereas the theist leans on a so-called divine life manual.