Why do Catholics deny the Words or Christ, “It Is Finished?“ Why do they continue the offering of a Eucharist Christ when the work of Christ was completed? Jesus' Accomplishments For His People The Following:

He provided the only way for sinful man to be saved. (Acts 4:12)
He testified to the truth. Those who seek the truth listen to Him. (John 18:37)
He came to give life to a world condemned to death. (John 14:6)
He showed the world the only way to the Father. (John 14:6)
He gave His life as a ransom for many. (Matthew 20:28)
He bore our sin in His body on a tree. (1 Peter 2:24)
He died for the ungodly. (Romans 5:6)
He gave Himself up for us as a sacrifice to God. (Ephesians 5:2)
He died for us so that we may live together with Him. (1 Thess. 5:9)
He gave Himself for us to purify a people that are His very own. (Titus 2:14)
He died for sins, once for all, to bring us to God. (1 Peter 3:18)
He became sin for us so, in Him, we could become the righteousness of God. (2 Cor. 5:21)
He has forgiven all our sins. (Colossians 1:14)
He purified us from all sin. (1 John 1:7; Hebrews 1:3)
He has reconciled us to God, changing our relationship with Him from one of hostility to one of harmony and peace. (Ephesians 2:14-18)
He redeemed us from the power of sin. (Galatians 3:10-14, 22)
He justified us (declared us righteous) (Romans:23-25
He expiated (took away) our sins and will never count them against us. (Hebrews 9:26; (Romans 4:6-8)
He saved us from condemnation. (John 3:18, 5:24)
He delivered us from the dominion of Satan. (1 John 3:8)
By His atoning sacrifice He satisfied (propitiated) completely the wrath of God for our sin. (1John 2:2)
He transformed us into new creations that long to obey God (Galatians 2:20; 2 Cor. 5:17)