Indeed, such a foolish argument. Dawkins is admitting that there had to be an initial intelligence. If you keep going back to the original intelligence, then you have to ask what caused that intelligence to exist? Answer: Some form of intelligence had to always exist, and now you just confirmed the existence of God.
A better argument would be entropy and long odds somehow bubbled us into being and we are all just bio-based robots, with really no choice, and we have developed the intelligence to stumble onto truth through the pleasure versus pain model as mentioned by Plato.
in the end, the moral code and the way taught by Jesus with his miracles and resurrection are what finally blow the bio-based robot argument to pieces which leads to your own relationship with God, and the real choice which is doing it our way or God’s way.