(Genesis 32:28) And he said, Thy name shall be called no more Iacob, but Israel: for as a prince hast thou power with God, and with men, and hast preuailed.
(Gen 47:26 KJV) And Joseph made it a law over the land of Egypt unto this day, that Pharaoh should have the fifth part; except the land of the priests only, which became not Pharaoh's.
(Gen 47:27 KJV) And Israel dwelt in the land of Egypt, in the country of Goshen; and they had possessions therein, and grew, and multiplied exceedingly.
(Gen 47:28 KJV) And Jacob lived in the land of Egypt seventeen years: so the whole age of Jacob was an hundred forty and seven years.
(Gen 50:22 KJV) And Joseph dwelt in Egypt, he, and his father's house: and Joseph lived an hundred and ten years.
(Gen 50:26 KJV) So Joseph died, being an hundred and ten years old: and they embalmed him, and he was put in a coffin in Egypt.
(Exo 1:6 KJV) And Joseph died, and all his brethren, and all that generation.
(Exo 1:7 KJV) And the children of Israel were fruitful, and increased abundantly, and multiplied, and waxed exceeding mighty; and the land was filled with them
(Gen 47:11 KJV) And Joseph placed his father [ISRAEL] and his brethren, and gave them a possession in the land of Egypt, in the best of the land, in the land of Rameses, as Pharaoh had commanded.
During this period the Israelite’s had total control over Egypt, so please tell me why they would flee?