(JTA) — MELBOURNE — Six months ago, Sheina Gutnick was a 31-year-old mother of three at the end of her maternity leave. She had degrees in social science and psychology, and several years of experience worked at a Jewish school. She was an average mother looking to get back into a 9-to-5 routine after her baby started daycare. Then, on the first night of Hanukkah, everything in her life changed. Gutnick was at a Hanukkah party in Melbourne, Aust…