“Modern Isr[ae]lis and most other jewish people alive today have nothing to do with the Judeans of the OT.”
You NEED to believe that drivel.
The reality is that every virtually male Jew whose name is Cohen, Kane, Kahan, Kaan, Kahn, Katz, Cates, etc, carries in his DNA the Cohen Modal Haplotype [CMH] — regardless of where his most recent forbears have resided — which marks him as a direct descendant of Aaron, the High Priest, elder brother of Moses.
Yes, THAT Moses. . . .