I don't know why but I expected more from you. First yoeur link is a Hebrew source who doesn't recogtnize Jesus as the Mewssiah, you an I BOTH Jesus IS the Messiah.
Your bigger problem is here :
Matthew 2019 and following. Matthew was most certainly talking about Jesus.
5 oBut he was pierced for our transgressions;
he was crushed for our iniquities;
upon him was the chastisement that brought us peace,
pand with his wounds we are healed.
Of course Jesus is the Messiah for Christians. There's just no mention of Jesus in Isaiah. The suffering servant is Israel.