Even an atheist is a child of God whom he loves as much as His believers. If an atheist cries out to God I believe he will be heard the same as me, a believer.
That's something I believe too even as an atheist... that
if there is a God that is benevolent and all that jazz, said God would understand that skeptics just require a bit more to believe some things -- it's hardly our fault for just wanting reasons to believe that are rationally justifiable.
I wouldn't reject a God if it existed (depending on its attributes) and if a God existed then it would know that.
If a child leaves a parent's house (imperfect analogy because the child knows the parent exists, but beside the actual point I'm making) and comes back sometimes even years later beaten and bruised, no parent is going to say "No, I don't know you, get out of my house." That's ridiculous, but it's what many religions say happens to skeptics.