In Isaiah 53 & Isaiah 28, plus what Yeshua stated is a minefield of being accurate with what is stated.

John, Paul, and Simon the Pharisees have muddled most people up, to follow something wrong.

Isaiah 53:6 'says the Lord placed on him all the sin'; yet how is that then forgiven... Yeshua taught repentance for the forgiveness of sin, and so for him to make intercession (53:11), you must be following his teachings. Where through his knowledge he turns people to righteousness i.e. atonement.

Isaiah 53:10 makes clear we can not think our sin is forgiven by his death, which is making him into an animal sacrifice, which is what the Pharisees have done, making it null and void...

This also is where it interlinks with Isaiah 28:9-19's Bed of Adultery, where they believe in a covenant with death, which was dis-annulled before it was even thought about.

The Covenant with Death is where Paul, says that through Christ's death, and resurrection, that is how people have been saved; in other words he acted as an animal sacrifice, that pays the price for people's sin... This is morally wrong, and defiles the Law in multiple places, making it all null and void.

Instead the only way is through what Christ taught, no one can sneak into Heaven, as it is a place of righteousness; thus we can not get in by claiming another's righteousness as our own (Ezekiel 33:12), neither can we get in by accepting something immoral to make atonement, we literally have to be worthy to ascend into Heaven.