True, but did you know that the Old Testament contains only one prophecy that mentions THE MESSIAH by name? This is found as part of the Seventy Weeks prophecy in Daniel 9:25,26.
"Know therefore and understand, that from the going forth of the commandment to restore and build Jerusalem unto Messiah the Prince shall be seven weeks, and threescore and two weeks: the street shall be built again, and the wall even in
troublous times. And after threescore and two weeks shall Messiah be cut off, but not for himself: and the people of the
prince that shall come shall destroy the city and the sanctuary; and the end thereof shall be with a flood and unto
the end of the war desolations are determined."
This is the only prophecy which names the Messiah doing anything from the Old Testament, although there are certainly other references. Now if you wanted to know what the Messiah would do, wouldn't you first go to the one prophecy that actually names him as such?
I had the opportunity to converse with a Rabbi and according to Judaism, Jesus couldn't possibly be the Messiah because he died. But wait, what did the one prophecy say about the Messiah when he appears? It said he would come at a particular time and when he arrived he would be "cut off" but it also said, "not for himself." Did you catch that? The Bible said that when Messiah comes he will DIE FOR OTHERS! Yet the Rabbis would say he can't be the Messiah because Messiah doesn't die...WRONGO! The Messiah must Die when he comes...die for others and that's exactly what the Lord Jesus did when he came!