I thought we were discussing majoritarian evidence, that is, whether everyone believing in a certain God would be evidence for that God, given that a minority believing in a certain God isn't evidence for that God. That the believers might have arguments that we didn't consider is a different topic.

Also, it's not merely that there might be another way to account for a majority-held belief in the Abrahamic God, it's that it is a historical fact that there is a causal chain that goes from Judaism to Christianity to Islam. In other words, we know it's not a coincidence that the populations of three different civilizations ended up believing in a similar God, and therefore there's no need to account for it.