I wouldn't worry too much about the Jews. If they post, we can see what some of them believe. You are right though that ch. 53 is about Messiah, the Redeemer of mankind's sins.
I think you will enjoy Isaiah a lot if you read it with the 'End of the World' in view.
Just to give you a short extremely important glance, I quote from chapter 24:
20 The earth shall stagger like a drunken man, and shall sway to and fro like a hammock;
and the transgression thereof shall be heavy upon it, and it shall fall, and not rise again.
21 And it shall come to pass in that day,
that Jehovah will punish the host of the high ones on high, and the kings of the earth upon the earth.
22 And they shall be gathered together, as prisoners are gathered in the pit, and shall be shut up in the prison; and after many days shall they be visited.
20: speaking of what happens when the sign of Christ appears in the sky.
21 speaking about how God shall punish 'high ones on high' as opposed to our high kings. This then refers to satan and the fallen angels who rule from the heavens, above earth. The kings of the earth, its rulers, will then be done away with.
22 satan and his angels imprisonment in the abyss and his later release is mentioned.
In this short reading, it should be clear how important the book of Isaiah is regarding the end that we live in.