@we3salatas This interpretation of Isaiah 53:8, based on my understanding, does not stem of analyzing the Hebrew words on an individual basis but rather the context of the passage. The general argument is that this passage is about Israel as a nation rather than an individual and that the passage makes more sense when understood in this fashion. In response, it may be noted that Zechariah 3:8 also refers to the Messiah as the ‘servant’ and that many other Jewish commentators, listed in the Jews for Jesus article, recognized that this passage was about the Messiah. The details of the passage also so closely resemble the events of Jesus’ life that He is the most clear object in mind. Now, some passages in Scripture also have double meaning - referring both to something at the time of the prophecy and something in the future. I hope those thoughts are helpful. May the Lord grant you wisdom as you study this matter.
Zechariah 3:8 - Listen, High Priest Joshua, you and your associates seated before you, who are men symbolic of things to come: I am going to bring my servant, the Branch.