This is actually what some fundamentalists argue, and they support their position with Jeremiah 18:5-8, "Then the word of Yahweh came to me, saying... "The instant I speak concerning a nation and concerning a kingdom, to pluck up, to pull down, and to destroy it, if that nation against whom I have spoken turns from its evil, I will relent of the disaster that I thought to bring upon it." To apply this to Tyre would be really straining to make an argument (so what's new with Bible fundamentalists?), because Ezekiel 28:17-19 verifies that Nebuchadnezzar tried to take the city but couldn't, and so for compensation Yahweh was going to give him Egypt. (That prophecy also failed, BTW.)
Zechariah, a postexilic prophet who came after Ezekiel [who wrote during the captivity, 1:2-3], also raged against Tyre (9:1-4), an indication that this prophet at least did not think that Tyre had "repented."
The Summer 1994 issue of *The Skeptical Review* has an article "Another Flaw in the Perfect-Harmony Theory" that examines Jeremiah's statement quoted above and shows how that the principle stated in it was unfairly administered in the Bible, especially during the reign of King Josiah.
Incidentally, a free one-year subscription to this publication will be sent to anyone interested in honing his knowledge of biblical discrepancies. With the request, please include your mailing address.
F. Till