1 All biological descendants of Israel had Syrian ancestry

2 Some or all biological descendants of Israel did not have Syrian ancestry

3 The historical person called Israel did not exist

https://biblehub.com/deuteronomy/26-5.htm

And thou shalt speak and say before the LORD thy God, A Syrian ready to perish was my father, and he went down into Egypt, and sojourned there with a few, and became there a nation, great, mighty, and populous:

Deuteronomy 26:5 King James Version

Israel was also called Jacob