Well I understand that you are not a practicing Catholic, but your personal opinions do not change the teachings of the Church or the nature of the Sacraments.
The Eucharist is a true sacrifice, not just a commemorative meal, as “Bible Christians” insist. The first Christians knew that it was a sacrifice and proclaimed this in their writings. They recognized the sacrificial character of Jesus’ instruction, “Do this in remembrance of me” (Touto poieite tan eman anamnasin; Luke 22:19, 1 Cor. 11:24–25) which is better translated “Offer this as my memorial offering.”
Perhaps you should cite the authority for your personal opinion.
The writer of Hebrews disagress with roman catholicism. There is no longer a need for the sacrifice nor does Jesus leave His throne at the command of a mere man. But contradicting the Word has never been a problem for roman catholicism.
12but He, having offered one sacrifice for sins for all time, SAT DOWN AT THE RIGHT HAND OF GOD, 13waiting from that time onward UNTIL HIS ENEMIES BE MADE A FOOTSTOOL FOR HIS FEET.
14For by one offering He has perfected for all time those who are sanctified. Hebrews 10:12-13 NASB
, not just a commemorative meal, as “Bible Christians” insist.
The first Christians knew that it was a sacrifice and proclaimed this in their writings.
To continue to insist as the roman catholic does is in disagreement with Scripture.
They recognized the sacrificial character of Jesus’ instruction, “Do this in remembrance of me” (Touto poieite tan eman anamnasin; Luke 22:19, 1 Cor. 11:24–25) which is better translated “Offer this as my memorial offering.”
The Greek translation makes this clear this is a remembrance of what Christ is doing for us...not an offering as He is the offering.
None of the major translation, including the Douay-Rheims translates the passage as you do.
The DR translates as following: And taking bread, he gave thanks, and brake; and gave to them saying: This is my body, which is given for you. Do this for a commemoration of me.
The key word is anamnesin. It conveys the following: "bring to mind") – properly, deliberate recollection, done to better appreciate the effects (intended results) of what happened; active, self-prompted recollection especially as a memorial (memorial sacrifice). HELPS Word-Studies
It is translated in the Greek as "remembrance" in both of the passages you cite.
Jesus' command to the disciples, and it was a command, was to do this in remembrance of Me.
Luke 22:20 is key to understanding the significance of what Christ was about to do on the cross.
He said, And in the same way He took the cup after they had eaten, saying, “This cup which is poured out for you is the new covenant in My blood."
Why is this significant? In the OT, there were several offerings which were offered for forgiveness. The Sin, Guilt, Burnt and Peace offerings required the shedding of blood.
In some cases, it was sprinkled against the altar. The blood not used was poured out .
In NONE of these sacrifices was the blood ever consumed. NONE
The people were forbidden to eat the blood (Lev 17:10; also Gen 9:4; Lev 3:17; 7:26; Deut 12:16, 23; 15:23; 1 Sam 14:31-34), since life belonged only to God.
: “For the life of the flesh is in the blood; and I have given it for you upon the altar to make atonement for your souls; for it is the blood that makes atonement, by reason of the life [that is in it]” (Lev 17:11).
For roman catholics to continue to insist the blood is eaten goes against not only the OT prohibitions on the blood, but also against what was reiterated in the NT at the Council of Jerusalem. The Council wrote: "Therefore it is my judgment that we do not trouble those who are turning to God from among the Gentiles, 20but that we write to them that they abstain from things contaminated by idols and from fornication and from what is strangled and from blood. " Acts 15:19-20 NASB.
The WHOLE CHURCH was in agreement with this as noted in Acts 15:22-29.
For the catholic to continue to insist the early church understood the "eucharist" as being a sacrifice is not substantiated in the OT or the NT in any fashion.
The Eucharist is just a commemorative meal, as the Bible insists.
Now then...