him give his explanation of why he does not believe in an all-knowing, all loving, all powerful God and it went something like this. If God is all loving, all knowing, and all powerful, why does he allow tsunamis, earthquakes, etc. to kill thousands of people?

His argument is a great oversimplification of a complex reality, and someone grounded in science should immediately recognize how oversimplified that argument is. What he fails to understand is that life is temporary and only meant to be temporary. How and when we die is relatively meaningless to an eternal creator when our mortality is but a blip to him. What matters is how we live while we are alive.

God places us on a world that can be dangerous to humans. We are the exact right distance from the sun, with the exact right atmosphere to protect us from the radiation (mostly-wear sunscreen) and be able to breath, with enough salt water and sunlight to perpetually create fresh water through precipitation. Without plate tectonics, the land we live on would likely always have been underwater or would eventually be underwater due to erosion. Those plate tectonics that are necessary for creating dry land also cause earthquakes and tsunamis. So, the very forces of nature that make earth inhabitable, also sometimes take us out. Being all-powerful does not mean He does not obey eternal laws of physics.

Hence, his conclusion that an all-knowing, all-loving, all-powerful God cannot exist is just another oversimplification of a very complex reality. But I do enjoy when he sticks to that which he knows about science.