PA TV to kids: Jews would have killed Muhammad had they known the foretold prophet was an Arab and not a Jew

PA TV children’s program The Best Home shows in its Stories of the Prophets an episode with a story about Islam's prophet Muhammad:
[When Muhammad was 12 he went with his uncle, a merchant, to trade in Syria. A surprise awaited them along the way:]
Man: "This boy is the prophet foretold in the Torah and in the New Covenant."
Uncle: "Muhammad, son of my brother, is a prophet?"
Man: "Yes, I advise you to take him back. If the Jews find out that the prophet of this time is of the Arabs and not of them, they will kill him."