I remember from WAY back in screwal daze And knowing many Jewish friends....some comments about the Ashcanazi ? region of eastern Europe that somehow adapted Judaism as their religion for some regional political/power reason or other......but supposedly it's rather different than the native Jews from the M/E regions....IE, IsREAL......
I certainly not an expert on this, but did read something on the .net a short while ago about this....but the article went on for many pages, and honestly I do not have the time/patience to read that much.....
FWTW.....there is some fair amount of Jewish background in my family.....
which is kinda funny in they are all liberals, and I make Uncle Barry Goldwater look like a communist.....many an interesting conversation over the decades.....