He's a self-hating Jew. Who said Jews can't be Anti-Semitic?
There could be loads of Jews who don't actually know that they are Jewish.
True Sarah and they are never blamed for not knowing, but when a person openly turns their back on who they are, then there is no forgiveness.
Even if a great (x20) grandmother from your mothers side was Jewish, would you be Jewish? I'm going to finish tracking down my ancestors.......i actually already discovered that one was an Earl. 
Sarah there are better members here than me to answer that, I don't spend alot of time knowing all the ins and outs.
But i am glad you are following your own path and finding out about your family. Knowing who you are, where you come from in this world is very important.
Good luck.
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