With some shrewd diplomacy, I don't hold it unlikely that Israel could remain a client Kingdom in the Roman Empire, allowed to keep their own rulers, faith, laws and even some troops to keep order and keep any caravan trade routes from Arabia Felix safe and open - then it needs to remain a faithful and true ally to Rome against the Parthians, Sassanids and Arabs, which is the only way I see it not being over-run by any of those.