Interpretation is always a bugger, especially in this arena, but I posted a lot more than just one. BTW, how do you supposedly know it wasn't a messianic prophecy whereas it has long been viewed as one of them? My guess is that you don't accept it for some rather obvious reasons, therefore it's convenient for you to label it as not being one.
About 15 years ago, I attended a three evening seminar taught by a Christian theologian who taught in the States, Canada, and Israel, and in his last session one of the things he said was that it is not possible to label Jesus as the Messiah as of yet because the messianic predictions have not been fulfilled. Now, he believes that Jesus likely will do as such during his "2nd coming", but until then...