News Flash: wearing a Star of David doesn't turn you into a Jew.
Gabriel is not Jewish, whether in terms of ethnic ancestry, religious belief, or cultural identity. He has never identified as a Jew until it became useful in advancing his political agenda. During the High Holiday season of 2007, Gabriel told me that he discussed Israel with campus representatives of Chabad, identifying himself as a Jew. When asked why he did this, he explained that he has a distant Jewish relative and that "you use what you have."