No it isn't. Obviously God exists as an idea, and atheists will say that the idea of God exists (indeed, you'd have to acknowledge the idea of God in order to reject it!). But theists believe that God is something that actually exists. Nope - and his post made a strawman of both atheists and theists (atheists don't believe that God exists as an idea? Theists don't believe God really exists, but only as an idea?) Exactly. And clearly, the theism / atheism debate is not about whether the idea exists (since that is trivially true), it's whether God actually exists.