To paraphrase Yeshayahu Leibowitz, Jews do not keep their faith because of the miracles they experience. It is their faith that leads them to interpret their life as miraculous.
What really happened that night, on that day hundreds and hundreds of years ago, when the Book of Exodus tells us that
Pharaoh rose up in the night, he, and all his servants, and all the Egyptians; and there was a great cry in Egypt… And he called for Moses and Aaron by night and said: ‘Rise up, get you forth from among my people, both ye and the children of Israel; and go, serve the Lord, as you have said. Take both your flocks and your herds, as you have said, and be gone; and bless me also.’
