It might be legitimate if you were arguing with a deist (holding merely the belief that there is some form of deity responsible for creating the universe) rathe

It might be legitimate if you were arguing with a deist (holding merely the belief that there is some form of deity responsible for creating the universe) rather than a Christian (holding the belief that God created the universe then sent a bunch of prophets to the Jews then appeared as his own son as a carpenter in Judea for some reason then got himself crucified by the Romans so that everybody's sins would be forgiven). The former of these (which I do not personally hold) is a more sophisticated and plausible than the existence of Thor, while the latter is pretty much on exactly the same level.