It is said by the Rabbis that Esau was Rome and Ishmael Islam. But let’s look at some other facts. The last war between Judah and Edom resulted in the forced conversion of all the remaining Edomite males. Hyrcanus conquered the whole of Idumea and undertook the forced conversion of its inhabitants to Judaism (Jos., Ant., 13:257ff.). This suggests that there were no Edomites around at the time of the creation of Islam. But Esau is Rome and Rome was involved in the creation of Islam.