According to Hay85 his, “mother reads the Old Testament. That's what makes her Jewish, in her opinion”. Referring to Jewish scripture as the Old Testament is more than “semantics” to Jews. The term Old Testament implies there is a New Testament. Most people who believe the New Testament is authoritative also believe the New Testament replaces the Old Testament. Indirectly, Christians are telling Jews that the Jews do not know how to interpret their own scripture. The Jews just don’t get it. If the Jews just wised up, they would throw out the Old Testament and accept the New Testament. It’s irrelevant the Old Testament was written by Jews, for Jews, using Jewish theology. It takes a Gentile to explain Jewish scripture to the Jews. Did I leave anything out?
Also, reading the Old Testament makes someone Jewish as much as reading a book on geology makes someone a rock.