The Sum of Awe
Brought to you by the moment that spacetime began.
Here is my more in depth response. If we mean "real" in the sense that the perception of supernatural agency is an accurate reflection of objective truth, then it makes no difference what people think or believe. Objective reality is entirely unconcerned with our opinion of it. We are almost always wrong, too. Would you believe people used to think the earth was flat?
If you are going down that road of saying "exists in the mind" or "real in the understanding" I'm tired of it after all those ontological argument threads, and I'm not going with you. I think that sort of thing is an abuse of the English language.
It's not the ontological argument
I'm merely saying, our perception makes a difference of the reality WE live. Objective reality, on the other hand, is an entirely different thing and we hardly live in it anyways, so what does that matter?