As a general point—independently of the question of the existence of God—I think that before we can say many people believing something is strong evidence that the thing is true, we need to consider why many people have the belief: how did they all come to believe it, and what sorts of evidence do they have for the belief?
Before we consider those sorts of questions, all we can say is that it is evidence, but not whether it is strong or weak evidence.
As a general point—independently of the question of the existence of God—I think that before we can say many people believing something is strong evidence that the thing is true, we need to consider why many people have the belief: how did they all come to believe it, and what sorts of evidence do they have for the belief?
Before we consider those sorts of questions, all we can say is that it is evidence, but not whether it is strong or weak evidence.