I would expect an omniscient being to have a better understanding of logic.Take it up with Jesus. He sees in black and white.
I got from Wikipedia that Christians make up one third of the world population, which leaves about 66% of us as non-Christians. I rounded it up to 70% mostly for convenience but also because of "closest atheists."They sentence themselves. I hope it is not more than your guesstimation of 70%, although the Bible tells us the majority will not see the Kingdom.
I sincerely disagree with the "they sentence themselves" statement.