If we are to believe you, Christians were simply continuing the annual observance of Passover, and in the meantime simply having *communal meals* without the Lord's Supper. THIS IS PATENTLY FALSE and both the New Testament and the witness of Christians about 100 years later will prove that. Also, the Corinthian church was not a Jewish church, but composed of both Jews and Gentiles (primarily Gentiles).
I. 1 Corinthians 11 is about the proper observance of Christian worship in the apostolic churches.
A. Christian women were to cover their heads during worship and this was an ordinance (vv 1-16)
B. The Corinthian church was full of contentions,heresies, and misbehavior (vv 17-19)
C. The Lord's Supper was NOT being properly observed hence "When ye come together therefore into one place, this is not to eat the Lord's Supper [...but to desecrate it with your rude behavior, thus violating the principle of genuine fellowship]. (v 20-22)
[Note:the fellowship meal was being held before worship. Fellowship is koinonia in Greek and communion in English. Hence Paul connects the Lord's Supper with communion in 1 Cor 10:16-17]
The cup of blessing which we bless, is it not the communion (koinonia) of the blood of Christ? The bread which we break, is it not the communion (koinonia) of the body of Christ? For we being many are one bread, and one body: for we are all partakers of that one bread.
D. It is the Lord Jesus Christ Himself who directly instructed Paul regarding the PROPER observance of the WEEKLY Remembrance Feast (v 23): For I have received of the Lord that which also I delivered unto you...
[Note:for confirmation of the weekly observance of the Breaking of Bread see Acts 20:6-12. For the weekly worship of Christians on the Lord's Day see Rev 1:10 and 1 Cor 16:1-3.]
E. The Lord's Supper was unique to Christian churches and had nothing to do with the Jewish Passover (vv 23-34) And this is confirmed here also:
II. I Corinthians 5 reveals a weekly gathering, not Passover
A. A SINNING CHRISTIAN REMOVED FROM FELLOWSHIP
4 In the name of our Lord Jesus Christ, when ye are gathered together, and my spirit, with the power of our Lord Jesus Christ,
5 To deliver such an one unto Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.
6 Your glorying is not good. Know ye not that a little leaven leaveneth the whole lump?
B. CHRISTIANS ARE UNLEAVENED BREAD
7 Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened...
C. CHRIST HIMSELF IS OUR PASSOVER LAMB
...For even Christ our Passover is sacrificed for us:...
D. THE REMEMBRANCE FEAST IS A WEEKLY FEAST
8 Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth.
[Note: unleavened bread represented sincerity and truth, leaven represented sin -- malice and wickedness. But because Christ FULFILLED the Feast of Passover, it is not to be observed by Christians any longer. Rather the Lord's Supper is a weekly Remembrance Feast]
III. Justin Martyr confirms these FACTS one hundred years later
Justin Martyr on the Lord’s Supper in 160 AD
And this food is called among us Εὐχαριστία [the Eucharist], of which no one is allowed to partake but the man who believes that the things which we teach are true, and who has been washed with the washing that is for the remission of sins, and unto regeneration, [Note: this is where the Catholic Church got its doctrine of baptismal regeneration, which we do not need to accept, since it is false] and who is so living as Christ has enjoined. For not as common bread and common drink do we receive these; but in like manner as Jesus Christ our Savior, having been made flesh by the Word of God, had both flesh and blood for our salvation, so likewise have we been taught that the food which is blessed by the prayer of His word, and from which our blood and flesh by transmutation are nourished, is the flesh and blood of that Jesus who was made flesh. [Note: This is where the Catholic Church got its false teaching of Transubstatiation, which we do not need to accept, since that too is false]
For the apostles, in the memoirs composed by them, which are called Gospels, have thus delivered unto us what was enjoined upon them; that Jesus took bread, and when He had given thanks, said, “This do in remembrance of Me, this is My body;” and that, after the same manner, having taken the cup and given thanks, He said, “This is My blood.” …
And on the day called Sunday, all who live in cities or in the country gather together to one place, and the memoirs of the apostles or the writings of the prophets are read, as long as time permits; then, when the reader has ceased, the president verbally instructs and exhorts to the imitation of these good things.
Then we all rise together and pray, and, as we said before, when our prayer is ended, bread and wine and water are brought, and the president in like manner offers prayers and thanksgivings according to his ability, and the people assent, saying Amen; and there is a distribution to each, and a participation of that over which thanks have been given, and to those who are absent a portion is sent by the deacons.
Note: This quotation from Justin is not to support Catholic teachings but to confirm that the Lord's Supper was observed weekly on the first day of the week (which he calls Sunday and which the apostle John called "the Lord's Day").