there isn't a shred of evidenceThis isn't the place for a discussion about the details of religion, but I guess my response to this is, "So what?"
You may need evidence, but people who believe in God don't need evidence. To them, God exists whether there is evidence or not.
At one time there was no evidence that hydrogen existed, yet is was still there.
At one time there was no evidence that x-rays existed. But they were still there.
At one time there was no evidence of other galaxies or planets. But they still existed.
Something can exist without there being current scientific proof of it. That certain people can see beyond what is physically in front of them is called "faith."