I would argue that deep down everyone does know that Catholicism is true. Look at TV shows and horror movies and you see Catholic references everywhere because they recognize the authority of the Catholic Church. People just don’t want to follow it because it’s a rigorous belief system which leads many to rationalizing why they’re not Catholic. That’s why I think people are so fast to point out whatever errors they can in The Church because they want some kind of reassurance. Others are just more historically illiterate and haven’t really searched for the truth much.
I think there’s a lot of truth to what you say. I would agree especially on the “some kind of reassurance” angle — you have a lot of people who don’t
want Catholicism to be true, because of what it would mean for them, so they find every way possible to find something wrong with it.
The only wrinkle I can see, is where another Christian belief system points to the Catholic Church as evil and is able to point out things here and there that, to them, contradict the Bible. When I was in college, a group of missionaries from out of state “invaded” our parish one Sunday morning during Mass and blanketed the cars with lengthy tracts, I would say three or four legal-sized sheets, printed on both sides, neatly typewritten, stapled in the upper corner. These tracts were really pretty sensible, well-written, and contained quite a bit of research on their part. They proceeded to take apart Catholic beliefs one by one, and there was quite a bit of internal logic to it. Not bad apologetics by any means.
I read this tract, and it took me the better part of a year,
by sheer force of will, not to have massive doubts and misgivings over Catholicism and Catholic practice. Every time I would say the rosary (and I said it every day), I would have to assuage my conscience — “this isn’t wrong”, “this isn’t a sin”, “God wants us to invoke Mary”, “these aren’t vain repetitions”, and so on. If my faith had not already been strong, and if I hadn’t read many, many books and articles on the Faith, I would have been lost. Even to this day I have pangs of involuntary doubt from time to time. If I had not adhered to the Church, stuck to her like glue,
forced myself to believe, I might well have snapped spiritually —
“These missionaries are right! Catholicism is evil! I need to get saved and leave the Church!”
And to belabor what is being discussed in other threads at the moment, would this have been my “conscience”?