He could have said it this way. As an agnostic atheist, I don't believe any organized religions are real. They're all made up. But I have no clue if God's exist. That's something humans will debate till the end. It's unknowable.
But Christians, Muslims and Jews claim to know. They don't know shit. Neither do Mormons, Hindu, Buddhists, Scientologists.
Regarding religions. I tell theists this. We are all Atheists. I just don't believe in one more god than you. LOL.
My indian buddy said he believes them all. God visits every 1200 years he said. Give or take.