The jews don't have the promise of God. They are slaves, children of Satan. Christians are free, children of God, heirs to the inheritance of Gods promise.

But what does the Scripture say? “Expel the slave woman and her son, for the slave woman’s son will never share in the inheritance with the free woman’s son.”

.

There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.

. About jews, Jesus has this to say:

You are of your father the devil, and your will is to do your father's desires.

https://www.biblegateway.com/passage/?search=John+8&version=ESV