Isaiah 53 is not a Messianic verse. The suffering servant is Israel.
Isaiah 53:4 Surely he hath borne our griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted.
So if the he here is Israel, whose griefs and sorrows has Israel borne? Is Isaiah saying that Israel was stricken to save the world?
5 But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed.
So Israel was wounded for our transgressions? When Israel suffers we are healed?
6 All we like sheep have gone astray; we have turned every one to his own way; and the Lord hath laid on him the iniquity of us all.
So is this a reference to the nations that they have all gone astray like sheep and all their transgressions have been put onto Israel?
7 He was oppressed, and he was afflicted, yet he opened not his mouth: he is brought as a lamb to the slaughter, and as a sheep before her shearers is dumb, so he openeth not his mouth.
Israel as a nation has been dumb?
8 He was taken from prison and from judgment: and who shall declare his generation? for he was cut off out of the land of the living: for the transgression of my people was he stricken.
To say that this is about Israel has got to be the most narcissitic view imaginable. Do they really think that of all people on earth they alone are sinless, that they alone suffer and it is for the transgressions of all the sinners?
9 And he made his grave with the wicked, and with the rich in his death; because he had done no violence, neither was any deceit in his mouth.
Please, I support Israel, I believe they have a covenant with God, but "no deceit in their mouth"? Come on. "They have done no violence"! This is balderdash.
10 Yet it pleased the Lord to bruise him; he hath put him to grief: when thou shalt make his soul an offering for sin, he shall see his seed, he shall prolong his days, and the pleasure of the Lord shall prosper in his hand.
11 He shall see of the travail of his soul, and shall be satisfied: by his knowledge shall my righteous servant justify many; for he shall bear their iniquities.
You have to be in complete darkness to think this can refer to anyone but Jesus. "My righteous servant" does Israel really feel that is a reference to them? They have been made "an offering for sin"! Once you deny that Jesus is the Messiah this is where it leads, self exaltation and self deception.