Isaiah is a considered prophecy of the Messiah, did Jesus fulfill all of this...

...prophecy? Isaiah 7:14-18
14 Therefore the Lord himself will give you a sign: The virgin will be with child and will give birth to a son, and [d] will call him Immanuel. [e] 15 He will eat curds and honey when he knows enough to reject the wrong and choose the right. 16 But before the boy knows enough to reject the wrong and choose the right, the land of the two kings you dread will be laid waste. 17 The LORD will bring on you and on your people and on the house of your father a time unlike any since Ephraim broke away from Judah—he will bring the king of Assyria."

So as I read this Syria is the kingdom of the two kings that will be laid waste and the king of Syria will be brought to Israel presumably as a slave. Did it actually turn out like that in Jesus' time? If not why does this not invalidate this as a prophecy about God sending his son Jesus to the virgin Mary?