Even if there were to be some objective evidence that a deity or deities might exist, where exactly does that leave us? It certainly by itself establishes no moral teachings or other guidelines.
Yes, and even if we could prove beyond all doubt that deities don't exist, that by itself does nothing to address the deep human needs which can rise to thousands of years of religion in every corner of the world.
There is overwhelming evidence that 1) such needs exist (even though their exact nature can be debated) and 2) those needs are very significant. So any commentary on this subject which doesn't make a good faith effort to address those needs is essentially bankrupt.
All religions rely on faith....
To be a bit more precise, all infinite scale metaphysical religious beliefs rely on faith. The practical advice on how to live as a human being can be tested in practice.
More to the point, experiences which are sometimes called "mystical" and sometimes associated with religion, need not rely on belief at all. If we go to the desert for 40 days and nights and have some experience, there is no requirement to then explain that experience.
As I see it, all religious beliefs are essentially (if unconsciously) a declaration that one lacks faith in the value of such experiences. They are an at least implied claim that the experience itself is not enough.
Take the Christian context for instance, just as an example selected at random. What if the experience of love is God? What if the huge towering facade of ideology is really little more than a place to hide from acts like serving the needy? What if the experience is the real deal, and the rest is just noise?
If what can be called religion is based on experience, and not explanations, there is no need for proof, or analysis, or debates, or conflict, or wars, or organizations, or church buildings, or money, or ranks and titles and authority and all the rest of it.
But if we rely on our faith, then we should at least have the knowledge that billions of others do the same, and that there simply is no way that we can establish that our faith is right and all others are wrong.
Therefore, to me, there are "many paths to God", not because all faiths must be correct but because it is virtually impossible to establish which is more correct.
If we're going to do beliefs, I agree that's the way to go about it. I sincerely believe that, and yet also sincerely believe I am right. I am human. I make no sense.
I think that's probably where much of religious faith comes from, the realization that we are too small and too dumb to ever wrap our minds around what's going on. If that's true, and one's mind demands an explanation anyway, faith would seem to be the best we can do.