Christian apologists love to distort Richard Dawkins's point

Many Christian apologists love to erode the credibility of Richard Dawkins by pointing to that one time when he (allegedly) said that even if something genuinely miraculous happened, like the stars in the sky suddenly moving and forming a readable message, he would still not believe in God (no matter what that message says.)

These apologists imply that Dawkins is just stubbornly denying and rejecting all evidence for the existence of God, based on principle rather than rationality, that no evidence could ever convince him because he just rejects all evidence as a matter of principle. They imply that Dawkins himself has openly declared that he will never believe in God and he will reject all evidence of his existence, as a matter of dogma. In other words, essentially putting your fingers in your ears and shouting "la la la, I can't hear you!" Thus, any rational discussion with him is useless and doomed to failure, because of his dogmatic refusal to accept anything.

This is not what Dawkins meant. It's not his point.

What Dawkins meant was that it's not possible to have definitive proof of God's existence. It's not that he will reject all evidence based on principle. It's that it's literally impossible to have such evidence.

And why is that?

Because even if something truly miraculous happened, there's no way to know its origin, its source, what caused it to happen. The only thing we would know is that something very unusual happened, that's it. Could be something natural from within this universe, could be something supernatural from somewhere else, but we have no way of telling which, and especially in the latter case what the actual source was.

Sure, the message in question could claim that it comes from the God of the Bible, but once again, there's no way to corroborate that's true. It could be something else just messing with us and sending us false messages for whatever reason. It could even be some kind of technologically extremely advanced alien race that's doing an experiment or just being evil (after all, "any sufficiently advanced technology is indistinguishable from magic" and "any sufficiently advanced alien is indistinguishable from God.") There's no way to know.

That was Dawkins's point. That is what he meant.

And he does make a good point. Even if something unusual happens that we don't know the reason for, or how it's even possible, there simply is no way for us to discern and corroborate where it's coming from, what is causing it to happen.

He is not saying that we should reject all evidence for the existence of God. What he is saying that there cannot exist such evidence because it cannot be corroborated. It's literally impossible. All such evidence would, at most, point to an unknown phenomenon, unknown source, and that's it. An unknown. We can't deduce anything from that.