“I repeat, no church should deny anyone the right to communion.”
Communion is not a right, it is a memorial act of obedience: “Do this in remembrance of me,” that signifies a claim of unity with the Body of Christ.
Churches and purported church members who turn a blind eye to another purported member’s notorious (public) and unrepentant behavior are as much in rebellion against God as that individual, and equally subject to the Matt 7:21-23. Your argument is not with me (who has no authority over you, and no office to pass judgment on you, but nevertheless I do have a duty to confront you, in love, with the truth) but with the Author of Scripture. I leave you to Him.
So I suggest that we let the Lord do the judging on who is right with Him and not a mere man.