…the LORD hath laid on Him the iniquity of us all. – Isaiah 53:6

It has been asked, Was it just that sin should thus be laid upon Christ? We believe it was rightly so, first because it was the act of Him who must do right, for “the Lord hath laid on Him the iniquity of us all.” Jehovah, He against whom the offense was committed, and who has ordained that the sin of the people spoken of should be laid upon Christ. To impugn this, then, would be to impugn the justice of Jehovah, and I pray that none of us may have the hardihood to do that. Shall the potsherd venture to strive with the potter? shall the thing formed contend with the Creator of all things? Jehovah did it; and we accept it as being right, caring not what men may think of Jehovah’s own deed. Remember, moreover, that Jesus Christ voluntarily took this sin upon Himself. It was not forced upon Him; He was not punished for the sins of others with whom He had no connection and against His will; but He His own self bare our sins in His own body on the tree, and while bearing it said, “No man taketh My life from Me, but I lay it down of Myself.” It was according to His own eternal agreement made with the Father on our behalf; it was according to His own expressed desire, for He had a baptism to be baptized with, and He was straitened until it was accomplished; and therefore whatever of injustice might be supposed, it is removed by the fact that He who was mainly concerned in it was Himself voluntarily placed in such a position. But I would have you remember, beloved, that there was a relationship between our Lord and His people, which is too often forgotten, but which rendered it natural that He should bear the sin of His people. Why does the text speak of our sinning like sheep? I think it is because it would call to our recollection that Christ is our Shepherd. It is not, my brethren, that Christ took upon Himself the sins of strangers. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0694.cfm