According to Rashi, the 11th century Rabbi, the answer is clear. The prophet is talking about Israel suffering for the Gentiles. Most Rabbis today agree that this is the Jewish interpretation of Isaiah 53. But there are opposing views within Judaism to Rashi's, including ancient Rabbis who interpreted Isaiah 53 as being about the Messiah. For example:
Link to the rest of this Isaiah 53 - Who is this prophet talking about?
I am done with you.
You are not giving me a link to any of that crap your posting which leads me to believe it's coming from a very biased sourse