How did the religion of Israelites differ from the others in the Fertile Crescent?

because the Israelite were monotheistic which means to believe in one god or goddess and the fertile crescent people were polytheistic which means to believe in many gods or goddess.

Jewish answer:

Judaism differed from other ancient religions in the following ways:

1) It was the only religion in which God spoke to the entire assembled nation (Exodus ch.19) of over two million people.

2) It made a complete break from the surrounding idolatry.