1 - Have you taken a look outside the window to see if heavens and earth are still around? The last time I checked them out they were still there. It means that the Law has not been done away with. (Mat. 5:18)
Isa 66:1 Thus saith the LORD, The heaven is my throne, and the earth is my footstool: where is the house that ye build unto me? and where is the place of my rest?
The house they built was the temple on the temple mount. This is why when the disciples pointed out the temple, Jesus said there would not be one stone left on another.
Heaven and earth that passed away was the temple in Jerusalem.
2 - I envy you to be able to walk in the dark while the rest of us walk by sight aka with understanding. That's what Paul implied in II Cor. 5:7 that Christians must walk by faith and not by sight. Besides, if you read James 2:21, Abraham was justified by the works of the Law. And if you read v. 26, faith alone is akin to a body without the breath of life. Enough?
3 - According to whom, you or Paul? Alas! All the same to me! And as the Redeemer of Israel is concerned, read Isa. 43:1. The Lord has redeemed us. The Lord our Savior. (Isa. 43:3)
4 - The Redeemer is the Lord Himself according to the scriptures just quoted above.
5 - What did Jesus do to classify as the Messiah and redeemer? Care to answer? You are not thinking about the gravity to blame Jesus with discarding the Law because even a liar you are making of him to be for he said he did not come to abolish the Law but to confirm it down to the letter. (Mat. 5:17-19)
Gal 4:4 But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law,
Gal 4:5 To redeem them that were under the law, that we might receive the adoption of sons.
He redeemed those under the law, thus he is the Jewish redeemer.
Tit 2:14 Who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works.
He redeemed us, thus he is the redeemer.
Jesus is God in the Spirit and a man in the flesh. As a man he became the sacrifice for our sins as it is by his blood that we are saved.
Rom 5:8 But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.
Rom 5:9 Much more then, being now justified by his blood, we shall be saved from wrath through him.