In this video, the speaker argues that the objection of "who created God?" is the worst argument against theism because it fails to recognize the distinction between things that need a creator and things that do not. He explains that theist philosophers argue for the existence of an uncaused and necessary being, and therefore asking who created God is nonsensical. The speaker suggests that Dawkins should engage more deeply with religious beliefs to understand and challenge them effectively instead of dismissing them with weak objections. He concludes that Christians have more mature responses to these objections than merely asking who created God.