John, You seem to be digging yourself into a logical hole. You say you have no belief system, as you use your own idiosyncratic belief about what is "logic" to decide whether there is a God or not. You cannot know. You cannot have talked to every witness. You cannot have seen every piece of evidence.

The fact that Billions of people believe something is certainly one logical reason to accept it. If you have other beliefs that you feel refute that. That is fine. If you came to those beliefs through what you feel is a logical process. That is fine also. But I would urge you not to confuse your belief in your process as truth or fact. None of us are omniscient. We must depend on our beliefs to function. I will grant that there is often a qualitative difference in the process by which different people come to their beliefs and that the difference can sometimes lead to better outcomes.

But Catholic belief in The Virgin Mary has prevented suicide in times of a grief and despair deep enough to kill many an atheist.

In that case, which belief is logical?