Good point. There is always the chance that God could be working in some mysterious mind-bending way but it seems unlikely.
Not just unlikely. His whole attitude of 'I'm totally hiding in humanity's darkest hours, and suddenly revealing myself just so I can starting punishing billions of surprised people' totally questions his "benevolent" part. What does the Bible say about the periods of History in which the ratio of faithful to known-world-population greatly decreases? Periods like the world wars, the Cold War, or the 21st century? Probably nothing considering that none of the medieval writers ever expected something like that. It makes me wonder what would've God done if the Cuban missile crisis or any other event like that had destroyed civilization.
"I have no religion, and at times I wish all religions at the bottom of the sea. He is a weak ruler who needs religion to uphold his government; it is as if he would catch his people in a trap. My people are going to learn the principles of democracy, the dictates of truth and the teachings of science. Superstition must go. Let them worship as they will; every man can follow his own conscience, provided it does not interfere with sane reason or bid him against the liberty of his fellow-men."