While I don't think the Big Bang really could've happened, the only way it possibly could've happened is if a God caused it. It's a scientific law that creation creates and accidents destroy. It's a scientific law that life begets life and spontaneous generation has been disproven so many times and the scientific community has pushed it into unverifiable fields so many times it's frickin laughable now. The big bang breaks so many natural laws so the only way it could've happened is if a supernatural being caused it. Unless you want to suggest that a world where the supernatural doesn't exist (at least that's what atheist scientists argue) was created by a supernatural event, which makes no sense.
The reasons I don't think the Big bang is possible are that there's so many problems with the old earth theory, including 1) oceans would be much saltier from volcanoes dumping salt in the oceans if it were that old, 2), animals that were thought to have been extinct for 65 million years have been found and discovered to be common in certain areas, meaning they've either avoided fossilization for 65 million years or something is wrong with the dating systems, 3) radio metric dating is not very reliable, as evidenced by mt St Helens, where rock was dated to be over 300K years old despite it being less than 10 years old, and 4) why does Venus rotate in the other direction if an explosion created the solar system, this breaks the conversion of angular momentum law (I may have a word wrong in that) that when force pushes forcefully, everything will be forced in that direction, nothing would defy it, especially not something created by it.