Nuno Loureiro was from Viseu, and the area was popular with the Jewish community during the Medieval Period in Portugal, I haven't seen any evidence that he and his family are Jewish, but it is possible. Portugal had a sizeable Jewish community during the Medieval Period. Fun fact, actress Daniela Ruah was born in Massachusetts but was mostly raised in Portugal and her father is portuguese and Jewish, so not that uncommon. If Israel is actually looking into it being an hate crime, then is 100% involved with the Jewish Community to some degree.