Are you denying that all “Catholic” churches are under the leadership of the pope?
Or are you denying that there is any substantive difference between Prptestant denominations who all claim to just follow the Bible?
I have seen Calvinists and Arminians battle here. Are you saying they are all one?
One of my Lay Dominican Homies is a Ukrainian Catholic. Every Lent he teases me because we give up the A-word and they don’t. And they have married priests, I believe.