Not replaced, corrupted a tad more fitting than, renewed, updated.
Im with you on Judaism,culture/ritual/superstition. Judaism is a perversion of Hebrewism/Christianity, Christianity has no roots in Judaism. So we can recognise Christianity when we find it in the OT, we must clarify our ideas about it. What is the essence of Christianity, expressed in a few words? Isn’t it this, that man is responsible for his own actions. If he disobeys YAHUAH, this disobedience is sin and the penalty of sin is death. Man must personally pay this penalty by his own death, unless someone pays it for him. But no other ordinary person could do this, because the other person is already under the death sentence for his own sins, and therefore could not die in your place. Therefore, YAHUAH provided the only possible sacrifice which could pay the penalty of you sins, Christ the Son of YAHUAH [being both the Father and the Son], being perfect and without sin, had no penalty of his own to pay. Therefore, when He gave His own life for us when He died on the cross, He paid all the penalty of our sins, so that we will not have to meet this penalty.