The Offspring of satan/serpent is not the offspring of God that Paul is speaking about, that is Two different offsprings Gen 3:14-15 !
You can't back up your statements (vain philosophy) with Scripture.
The only thing you can do here is infer that Paul is a liar.
Paul, in Acts 17:28,29, calls these Athenian idolatrous Greeks, "the offspring of God." He never refers to the elect whatsoever. He calls all of them "the offspring of God," and when he does, he quotes from one of their unsaved poets!!
How do you account for that?
Act 17:28 For in him we live, and move, and have our being; as certain also of
your own poets have said, For we are also
his offspring.
Act 17:29 Forasmuch then as
we are the offspring of God, we ought not to think that the Godhead is like unto gold, or silver, or stone, graven by art and man's device.
--At this point not one of them were unsaved.
They were all Epicureans, Stiocs, etc.--vain philosophers and idolaters.
They were the offspring of God because they had been made in the image and likeness of God, as God had said.
You do err not knowing the scriptures.