I will never, at any point in time, every understand this absolute failure of logic. It's in the fucking Bible!
The claim is made, constantly, that miracles come because of belief. They happen not because one man believes, but everyone witnessing believe it, but it is in the Bible, multiple fucking times, that God and his chosen representatives carried out miracles, in front of nonbelievers, in order to show those nonbelievers that God is real and has real power! But no clear miracle has been performed in . . . centuries at least. Always with the claim "if everyone believed it, then it would happen." Nevermind how many times their own book claims there was only one believer, and the rest were shown the miracle to demonstrate it.
If God is real, if his power is real, and you are a vessel for it, not everyone has to believe what you say for the miracle to occur. It's actually the point, so the miracle can prove the power! But, even this just proves God is a man made construct, made by the most stupid. God is that damn stupid that God doesn't realize how to use his power to prove his presence. "Nope, you gotta believe in me first, no matter what those nomads in the desert got."