>Do real ethnic Jews even exist anymore as a distinct group?
I don't think so, except in the sense that you still have saved ancient Jews like Paul the apostle, who are not dead today according to biblical cosmology.
I think the early Christians, which became the people of God as it says in the New Testament (Romans 9:24-26, Galatians 4:28-31, 1 Peter 2:9-10 KJV), had all their emphasis on being "in Christ," who was the one seed of Abraham (Galatians 3:16) and born of the Spirit (born again) rather than saved by their own physical heritage. The only people who still emphasized physical heritage did so only because they denied the pre-eminence of Jesus Christ. Such as the pharisees. However, ironically, these groups were actually descended from Edomites (see the origins of the Herodian dynasty), and the religion of pharisaism or talmudism was mostly adopted by other pagan peoples in later times. So despite claiming to be Jews, these people have basically no real relationship with the ancient Jews. But despite their constant lies on this account, they do still represent a "spiritual succession" from the pharisees, as Jesus forewarned us in John chapter 8 when He rebuked the scribes and pharisees of His day as being of their father, the devil, who is the father of lies and a murderer from the beginning. Later in the book of Revelation we have more prophecies of the so-called "synagogue of Satan" which say they are Jews, and yet, they are not. The existence of modern Judaism today is a proof of the fulfillment of that very prophecy. Namely, people who always say they are Jews, but in actuality they are unrelated to the Biblical Jews. They're the synagogue of Satan, and everything they say is a lie that turns the truth on its head. Often times, they try their hardest to do the exact opposite of what is right. This is why they promote sodomy, extreme promiscuity, and abortion, among many other mental illnesses that they often promote today through hollywood and other media. As it says in the book of Isaiah, "Woe unto them that call evil good, and good evil; that put darkness for light, and light for darkness; that put bitter for sweet, and sweet for bitter!"