Case in point: Egypt didn't suffer plagues because it was unlucky enough to build downwind from some volcano - it suffered them because of their immorality, their idolatry, and specifically because of Pharoah's stubbornness. Pharoah was asked ten times to "Let My people go" - ten chances to stop the progressive, punative plagues. Those plagues demonstrated conclusively that the Egyptian gods were impotent at best, and wholly false at the worst, while clearly demonstrating that the God of Moses was alive and more powerful. Pharoah refused to obey God. Pharoah received a consolation prize - free swimming lessons.
Perhaps instead of asking the old undergrad question "If God is all-powerful, can God make a rock so big that even He cannot move it?", we should move on to the grad school follow-up "If God is all-knowing, would He know better?"