And the Messiah was to be a military leader who would defeat the Assyrians and have an earthly kingdom, neither of which Jesus ever did. And I also believe that bit about "She will call his name Immanuel" was about the messiah as well, but I don't remember 100%. At any rate, since Jesus was never called that we can conclude that passage was not about him.
Christian apologetics is the art of rolling a dog turd in sugar and selling it as a donut.