“Rome” is simply refers to the Roman Catholic church by its primary magisterial seat, like as “Washington” can be used to refer to America. I also use “Prots” sometimes for ourselves, and (so-called) “JW’s for you know who, or (so-called) LDS for the another entity, which should also be acceptable.
And besides sometimes saving these stiff fingers some typing, it is often necessary to differentiate btwn RCs and the Orthodox due to the various and significant things they disagree on.
Perhaps we could use “the Roman church” or “the church of Rome” as these should not be offensive, but referring to the Roman Catholic church by its primary headquarters should also not be offensive.
Perhaps not. The Vatican is the seat of the Catholic Church, Eastern and Western.