The first reference to Mount Sinai in the Torah occurs when our teacher Moses witnessed a strange phenomenon there. As he was shepherding his sheep he glanced up at the mountain and saw a thorn bush that was burning without being consumed by the fire.
Diversity in Judaism is common in our history and liturgy. One can visit many synagogues and observe that the order of davening and the text of siddur vary from shul to shul. When I'm in Israel I often attend the services in a Sephardi shul where the prayers and the sequence of taking the Torah from the ark and replacing it are vastly different from what I'm accustomed to.