The blood sacrifice was an ordinance of the day of Passover under the old covenant. Passover is a day:
Lev 23:4 These [are] the feasts of the LORD, [even] holy convocations, which ye shall proclaim in their seasons.
Lev 23:5 In the fourteenth [day] of the first month at even [is] the LORD'S passover.
The day set apart by God is still there. The method of observing it is changed under the new covenant since animal sacrifices are no longer needed. The day still occurs every year, on the 14th day of the first month of the Jewish year. It is the LORD'S passover. Jesus Chirst is the Lord. It is His passover.
The fact remains that there is no biblical evidence of a new testament "passover" where the physically uncircumcised were permitted to participate. Paul and the others referred to the Christian ordinance as the Lord's Supper, not passover. That you cannot disprove.
I've showed you where Paul commanded Christians to celebrate it...to "keep the feast" of Passover. I've shown you where Paul and the early council said that physical circumcision was not a requirement of the new covenant. Since the church at Corinth was composed of both gentiles (uncircumcised) and Jews (circumcised)then it's pretty clear that his instructing them to keep the feast included all the Christians there.
I'm not sure why you're drawing a distinction between the Lord's Supper and Passover. The Lord's Supper to Paul meant the bread and wine that Christ commanded they eat to remember him. This was done of Passover. The new covenant Passover meal is the bread and wine, the blood and body of Christ. Christ is the passover.
Yes, and the animals that were killed were called "the Lord's sacrifice". So what? Does that mean there were perpetual? Do you still kill animals? What about "the Lord's heave offering" or "the Lord's priests" or "Lord's tabernacle"? There are lots of things in the old covenant identified as being "the Lord's" that have been done away with.
The day set apart by God is still there. The method of observing it is changed under the new covenant since animal sacrifices are no longer needed. The day still occurs every year, on the 14th day of the first month of the Jewish year. It is the LORD'S passover. Jesus Chirst is the Lord. It is His passover.
Sorry, you're still missing something here by continuing to live in the shadows of the older covenant.
"For indeed Christ, our Passover, was sacrificed for us." (1 Cor. 5:7)
Christ didn't just modify the keeping of passover. He fulfilled it. Just as He fulfilled all the blood sacrifices and feasts of the older covenant. There is no true passover without the external sprinkling of blood (Heb. 11:28). There is no more passover because there is no longer a need for a shadowy, bloody type to point to our Tue Passover, Jesus Christ.