To me, "You have a little Jew in you" sounds a lot more offensive than just "Jew someone down" -- a usage that is painfully offensive in itself, but might be explained by someone not understanding that it's an ethnic reference. (When I was a kid, I thought half-assed was spelled half-ast and had nothing to do with buttocks.) This sounds like a deliberate reference to the stereotype. Yuck.

I am sorry you has this woman's shit flung at you.