If your estimation of the likelihood of God is negligible, then it may as well be zero.
This doesn't follow. For example, if you recite to me a 17 million digit number, my estimate that it is a prime is about 1 in a million by the prime number theorem. But, if I then find out that the number was in fact 2^57,885,161 -1, my estimate for it being prime goes up by a lot. So one can assign very small probabilities to things and still update strongly on evidence.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.