Jacob’s Sons | Romans 9-11 with Johannes Gerloff #08

Paul calls those, in whose place he wants to be cursed and cut off from Messiah, “Israelites”. Shouldn’t he have called them “the Jews” or “the Jewish people” as it would have been self-explanatory in his time? Or, should he not have called them “Sons of Jacob”, “House of Jacob” or “Jacob”, if he would have preferred a biblical terminology?