That's the point he is making. He's saying the jews are wrong for thinking their genes get them to Heaven.
Not all bipedalling hominids have souls. "these are those making divisions, animals, not of the
spirit"(Jude 1:19)
spirit here is the word
πνεῦμα (
pneuma) which describes the spirit passed down through Adam, seperating him from the beasts of the earth, the same word used in Genesis as the spirit breathed into Adam. This is different to the word
ψυχή (
psuchē) which means simply "life force" and can be corrupted by sin. The life force can be corrupted, the spirit (what we usually call a soul) is eternal.