I did my own research now and indeed it is her father who is Jewish. Unless we go by Hitler's definition of a Jew (any grandparent) and not the ancient one, then Giffords is not a Jew unless she formally converts and then takes the conversion seriously. Nice to see she appreciates the Jewish heritage. Judaism is not only a creed where you join like you join a club or committee. It is also a family and it has rules how the lineage is established.
I guess the really notable thing in all this is that the shooter thought she was Jewish and that was enough for him to come after her. In terms of her being a Democrat she is a self-professed blue dog and there are a lot of Democrats to the left of her. Yet the shooter singled her out and there is much evidence that he was really anti-Semitic. And it seems he is using Hitler's definition of a Jew --- anyone with one Jewish grandparent, regardless of which one, is, in the Nazi view, a target.
As for Reform, it is not the greatest authority on this. There are no uniform standards in Reform. If a Reform congregation votes that blowing soap bubbles on the beach in Malibu makes someone a Jew, then that is the standard in that Reform congregation.
Giffords' grandfather, Akiba Hornstein, the son of a Lithuanian rabbi, had acquired the nickname of Gifford during elementary school and changed his name to "Gif Giffords" once he was in the desert, to protect himself from anti-Semitism. Some Jews change their names. This evidently did not help in the sense that his granddaughter was still shot. See here ---
http://azstarnet.com/news/article_ca22c3e8-57df-593b-87f0-b1e3617ef74b.htmlThat article also says Giffords' mother is not Jewish.
So I have to agree with Snagglepuss, and thanks, Snagglepuss, for the heads up.
I hope Giffords pulls through. The whole thing is such a monstrous tragedy. And now the right wing is saying, "Who me?"