From a fulfilled view, to be "crucified with Christ" (Galatians 2:20) means that the old covenant identity tied to the flesh, the law, and national Israel was put to death. Paul, representing faithful Israel, died to that old system when he embraced Christ.

In this view, the crucifixion wasn't just Jesus' physical death, but a covenantal transition. By being "crucified with Christ," Paul declared that he no longer identified with the law based righteousness of the Old Covenant, but with the life and righteousness found in Christ, the fulfillment of all God's promises.

That death meant:

A death to the law (Galatians 2:19)

A death to the flesh and works-based identity

A resurrection into a new creation life (Galatians 6:15), lived by faith

Christ now lives in the believer, because the New Covenant dwelling of God with His people has come (Revelation 21:3). The "crucifixion" is spiritual and covenantal, it represents the end of the old world and the beginning of the new.