That's ridiculous. The claim that unicorns and hobgoblins don't exist is also unfalsifiable but we human beings aren't purely rational automatons that can't tel

That's ridiculous. The claim that unicorns and hobgoblins don't exist is also unfalsifiable but we human beings aren't purely rational automatons that can't tell the difference between fantasy and reality. In the absence of falsifiable claims, the burden of proof lies exclusively on the person making a positive statement of existence (that there is a supreme being). If you care about truth, preaching from a book is so much worse.