Panspermia is an interesting hypothesis that can't be tested yet. Recent discoveries make it seem less unlikely to be the origin of earthly life, but that doesn't make it probable. For what it's worth, the earliest signs of life are found shortly after the Hadean Eon when the crust had cooled sufficiently (though it was still pretty damn hot with lots of volcanic activity) after a lot of pounding from meteorites.
I'm not anti-Christian. I'm anti-stupid.