the historical ignorance is breathtaking.
prior to 1054, the Orthodox were in communion with the Catholic Church, all part of the One, Holy, Catholic and Apostolic Church.
the Baptist heretics( that i believe you follow ) did not show up for 500 years after the Great Schism.
i am grateful that unlike Baptism and the Eucharist, the Baptists accepted the Catholic canon of the NT.
since the canon of Scripture was not attacked until the 16th century, there was no reason for the Church to authoritatively set the canon. there were no 66 book Bibles used by anyone prior to the 16th century. various Church councils in the 4th century set the 73 book canon and this was universally accepted until 7 books were thrown overboard by certain sects in the 16th century.
one is only Catholic if they hold to the Catholic Faith. since Baptists do not accept the Nicene Creed, they can not be considered “Catholic” in any sense.
It seems you know nothing of history OR baptists.
Did you not know that the Orthodox NEVER accepted Papal authority over them?
Were you not aware that there were MANY discussions about what was scripture and what was not, although the majority of the NT was never questioned?
Were you not aware that the accuser of Luther had written that the Apocrypha wasn’t to be used for doctrine?
And no, I’ve never met a Baptist who claimed to be Roman Catholic. We do claim to be Christians - which I believe the Roman Catholic church now accepts - and thus part of the catholic - universal - church.