However, ancient jews and modern jews don't share any dna so his point ain't wrong necessarily.

I'm not sure where you would get an idea like this

Ashkenazi, Mizrahi and Sephardic Jews all share about half their DNA originating from these ancient Jews

A 2020 study on remains from Bronze Age southern Levantine (Canaanite) populations found evidence of large scale migration from the Zagros or Caucasus into the southern Levant by the Bronze Age and increasing over time (resulting in a Canaanite population descended from both those migrants and earlier Neolithic Levantine peoples). The results were found to be consistent with several Jewish groups (including Mizrahi, Ashkenazi, and Sephardic Moroccan Jews) and non-Jewish Arabic-speaking Levantine populations (such as Lebanese, Druze, Palestinians, and Syrians) deriving about half or more of their ancestry from populations related to those from the Bronze Age Levant and Chalcolithic Zagros. The study modeled the aforementioned groups as having ancestry from both ancient populations.[25][26]

https://en.wikipedia.org/wiki/Genetic_studies_on_Jews