To be pedantic. Moses was not the leader of Judaism. In fact the term “Israelites” derives from Jacob Israel son of Isaac, son of Abraham. Abrahams other son was Ismael who is the father of the Arabs who mostly turned to the Abrahamic Religion with the Prophet Mohamed s.a.s. As for the descendants of Isaac they had many phases of having more or less on leader or being separately lead tribes, like the famous twelve tribes at the time Moses freed them from the Pharaoh. And if we look at the Torah they weren’t exactly happy with Moses spiritual leadership. Either way Moses was only a short period in a time spanning thousands of years.