Most people think the idea of "one God" is ancient and universal, but exclusive monotheism is actually only about 2,500 years old. It was born in the trauma of the Babylonian exile in 586 BCE, when Judean elites lost their temple, land, and king, and responded by declaring Yahweh the only real God while calling every other god non-existent. That crisis-driven shift became the foundation for Judaism, Christianity, and Islam. For the vast majority of human history, polytheism was the normal way people lived.
Yes, accurate. In the Hebrew Bible, God (YHWH) is called the โGod of Israelโ over 200 times and the โGod of the Hebrewsโ (e.g., Exodus 3:18, 5:3). He is the God of Abraham, Isaac, and Jacobโthe ancestors of the Hebrew/Jewish people.