B.B. my experience with the WT ,going back to the 1960`s was that they always had an article or two every year against the R.C.Church maybe i was more attuned to it because my brother in law was a staunch catholic and we used to have long discussions about religion.
Two things that stand out to me as far as the WT was against the R.C.Church was an article in the WT dealing with "The chief cornerstone " of religion and it dealt with the claim of the church `s claim to the apostle Peter.
And of course the WT`s response that it was a foundation built on a dubious foundation.
The other one that sticks in my mind was an article that stated that the R.C.Church was the dominant member of Christendom that all other christian religions sprung from and that they had a Pope who they claimed was the Vicar of christ on earth
And while they spoke about christendom it was always as I remember it as the R.C.Church as the principle opponent of Christ jesus kingdom.