The T'nach (Jewish bible) is replete with passages stating that G-d will save various people (or passages with people asking G-d to save them).
Not one of them says the messiah will come and save anyone.
The passage says that G-d will save -- let's read Y'shayahu / Isaiah 35:4: "Say to the hasty of heart, "Be strong, do not fear; behold our G-d, [with] vengeance He shall come, the recompense of G-d, that shall come and save you."
Yet again the list maker presents a statement about G-d and states (with no support whatsoever) that it is a prophecy about Jesus.
It is ironic that this chapter is actually describing the fact that Jerusalem will rejoice over the downfall of אֱדוֹם / Edom -- and in Judaism אֱדוֹם / Edom is defined as Christianity. Once the Roman empire became the Christian empire the identity of אֱדוֹם / Edom was transferred to the Christians.
What of Matthew 1:21? The passage says "She will give birth to a son, and you are to give him the name Jesus,[a] because he will save his people from their sins.”
Yet G-d warns you that the "son of man" has no salvation.
The son of many cannot save you.
“Don’t rely on ‘princes’ or on that ‘son of man’ —he has no ‘salvation’! When his spirit departs he will turn back into his dust; on that very day all his schemes will be destroyed!” (T'hillim / Psalm 146:3-4).
The term the Son of man is used to refer to Jesus 32 times in Matthew,
The term the Son of man is in Mark 15 times,
The term the Son of man is in Luke 26 times.
The term the Son of man is in John 12 times.
This brings up a very important point: no one can save you from your sins -- and the term "saved" in the T'nach (bible) always refers to people's lives being saved. The immortal soul is perfect and does not need to be saved. No one can die for the sins of another, and human sacrifice is strictly forbidden. Thus the Torah rejects the assertion of the anonymous author of Matthew: "Fathers shall not be put to death because of sons, nor shall sons be put to death because of fathers; each man shall be put to death for his own transgression." D'varim / Deuteronomy 24:16.
Jesus died for your sins ≠ Each man must be put to death for his own sins.
Christianity teaches the opposite of the teachings of the bible. The Torah tells us that if someone comes along and changes the teachings of the bible that he is a false prophet -- thus the person who wrote Matthew was in error. It is a false teaching.
The Christian bible also erroneously teaches that sin has separated man from G-d, and further that the consequence of sin is death (Romans 6:23).
The Christian bible goes so far as to say that only G-d can remove sin and deliver man from sin’s penalty (hell) (2 Timothy 1:9; Titus 3:5).
The T'nach (Jewish bible) utterly rejects these ideas.
Man is not separated from G-d. "By loving kindness and truth iniquity is atoned for..." (Mishlei / Proverbs 16:6) and "If you return to G-d you will be restored; if you remove unrighteousness far from your tent...then you will delight in G-d..." (Iyov / Job 22:23-27).
Only the one who sins can atone for his own sins -- and there is no hell. G-d tells Cain as much in the first book of the bible: "sin is crouching at the door. It lusts after you, but you can dominate it.'" B'reshit / Genesis 4:7.
What of salvation?
Don't we need to be "saved"?
Nope. No such concept in the T'nach (Jewish bible).
In the Jewish bible the term "salvation" only refers to being rescued from physical danger.
Salvation has nothing to do with our immortal souls.
We are not separated from G-d -- indeed He is close to all who call upon Him. In D'varim / Deuteronomy 33:29 Moses said we are “a nation that has been saved by HaShem”) and Yeshayahu / Isaiah 45:17 says the Jewish nation “has been saved by HaShem”, adding that “this is an eternal salvation”). Note that, in both verses, the words used were “has been saved” or "continually being saved" -- but again this is speaking of our physical existence -- not our immortal souls which are perfect and do not need to be saved.
The Hebrew word for salvation, יְשׁוּעָה y'shu'ah, is a FEMININE NOUN. The meaning of יְשׁוּעָה in the Scriptures is very different from the way it is misused in by Christian missionaries. In Hebrew, it simply means being “rescued” from danger—typically by the rescuer engaging in physical combat (fighting) with an assailant who is attacking the person being “saved”. In the T'nach, “saving” is almost always associated with “fighting” or “waging war”.... I refer you to any or all of the following examples:
• “Just stand still and you’ll see HaShem’s salvation that He is going to do for your today....” (Sh'mot / Exodus 14:13)
• “HaShem saved Israel from Egypt’s power that day....” (Sh'mot / Exodus 14:30)
• “HaShem set up a savior for Israel—Otniyél ben K'naz, Kalév’s younger brother....” (Shoftim / Judges 3:9)
• “HaShem set up a savior for them—Éhud ben Géra the Bin-y'mini, who had a deformed right hand....” (Shoftim / Judges 3:15)
• “....and he, too, saved Israel....” (Shoftim / Judges 3:31)
• “If You will save Israel through my hand, as You have spoken....” (Shoftim / Judges 6:36)
• “....you didn’t save me from them....and, when I saw that you hadn’t saved me....” (Shoftim / Judges 12:2-3)
• “HaShem saved Israel that day....” (Shmuel 1 / 1 Samuel 14:23)
• “....so David saved the inhabitants of K'ilah....” (Shmuel 1 / 1 Samuel 23:5)
• “HaShem is my Light and my Salvation--
Whom should I fear?
HaShem is the fortress of my Life--
Whom should I dread?
If evil men approach me
To devour my flesh--
[When] my adversaries and my enemies [attacked] me--
Wow! They stumbled and fell!
If an army encamps against me
My heart will not be afraid;
If war breaks out against me--
On this [assurance] I can rely!” (T'hillim / Psalm 27:1-3)
The above verses (and these are only a selection—there are many, many more) demonstrate how the Hebrew for "saved" and even words for savior and salvation have nothing to do with the soul needing to be saved -- the Christian concept of "salvation" is totally foreign to the bible itself! Thus Matthew 1:21 is rejected by the Torah, and Isaiah 35 does not in any way "prove" Matthew 21 -- quite the opposite is true.