Ask them. Just ask them. You’ll be fobbed off with anecdotal “evidence” and peculiar analogies but not one person can provide a shred of credible, tangible, testable, evidence that there is a god. Instead they flip it and try to get the asker to prove there isn’t a god, which is ridiculous at best.
Instead they try to dispute scientific theories such as evolution by taking the word theory and assuming it means guess.
They try to tell you that the Big Bang theory is ridiculous because how can something come from nothing? So if everything needs a creator…
They don’t have a leg to stand on. Your religion belongs in the dark ages. If you refuse to accept change, you belong in the dark ages with it.