God can do anything He wants to do.
God decided to create a new earth with people from this earth to be its inhabitants. It would be a sinless world.
There was one problem. All the inhabitants of this earth were descendants of Adam and Eve condemned to death and Hell because all had sinned.
God would first have a people by establishing a covenant. agreement between Abraham, Isaac, and Jacob / Israel. They would be the Jewish people.
Through them — the descendants of Abraham and Sarah— would come the One that could save them for the new earth.
God would have an only begotten Son who would have a Jewish mother.
He was named by His Father through a messenger —
His name shall be called Yeshua for He shall save His people from their sins.
The supernatural spirt inside this Jewish body would be the sinless one who would die and take on the iniquity of everyone.
He would die and “take away the sin of the world” freeing the descendants of Adam and Eve from their condemnation of death and Hell. And He would rise from the dead to be their ruler forever.
Thus the inhabitants of the new earth would be those Jews who believed in Him.
The Gentiles who believed in the Jewish Savior were considered to be Jews by God — like a branch from one tree being grafted into another tree and then becoming like the tree it was grafted in to.
The new earth will be inhabited by Jews who believe in Yeshua and grafted in Gentile Jews who have also believed in Yeshua / Jesus.
But according to His promise we are looking for new heavens and a new earth, in which righteousness dwells.