What is “the communion of demons”?

What is “the communion of demons.”?  We know that St. Paul condemns it in 1 Cor 10: 15-22.

“Therefore, my beloved, avoid idolatry.  I am speaking as to sensible people; judge for yourselves what I am saying. 16.  The cup of blessing that we (Catholics) bless, is it not a participation in the blood of Christ? The bread that we (Catholics) break, is it not a participation in the body of Christ?  Because the loaf of bread is one, we, though many, are one body, for we all partake of the one loaf.”

Since Catholics obey “If you do not eat My Body and drink My Blood you do not have life in you.“, we are “one body”.

Only Catholic priests ordained in living link with Jesus’ Ordination of The First Catholic Bishops may provide, through The Miracle of Transubstantiation, the Actual Body and Blood of Christ.

What of other services, even those insisting “We have communion, too!”
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How may those who provide a “look alike” ceremony while simultaneously rejecting The Actual Body and Blood of Christ be part of “the one body of Christ.”?

St. Paul says of those who would not accept The Messiah’s Teaching:

18.  Look at Israel according to the flesh; are not those who eat the sacrifices participants in the altar?  19.  So what am I saying? That meat sacrificed to idols is anything?  Or that an idol is anything?  

May we apply that to look-alike services?   20.  No, I mean that what they sacrifice, (now, by refusing His Actual Body and Blood) they sacrifice to demons, not to God, and I do not want you to become participants with demons.  21.  You cannot drink the cup of the Lord and also the cup of demons. You cannot partake of the table of the Lord and of the table of demons.  22.  Or are we provoking the Lord to jealous anger? Are we stronger than He?

What is “the communion of demons”?  St. Paul says that it is not Catholic Communion!

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