However, according to Ladislaus, and I think the other "feeneyites" (descriptor, not insult) I don't see how he could go to heaven. While he's totally not culpable for this, he *doesn't* have the correct formal motive of faith. He's trusting his own interpretation of the Bible for truth. Not the Catholic Church.
I could be missing some fine distinction here, I just don't know what he is.
Well, that's not 100% true ... about my position. I have said it before that I consider it hypothetically possible that, say, the baptized 10-year-old Protestant boy, despite technically being at the age of reason, still has a very foggy, vague, and muddled view of things ... to the point that his heresy MIGHT be purely material. I recall the state of my own mind at that time and realize that things were a bit foggy.
I've used this analogy before. If a Catholic missionary found a savage in the jungle, and just instructed him regarding the Holy Trinity and Incarnation, baptized him, and he died, he would be Catholic. Let's say a Prot minister did the same thing ... instructed him in the same core mysteries, baptized him, and he died. In both cases, he dies in the same state, as a Catholic. I believe that there are some people, especially, say, a 7- to 10- year-old, who might be in the same very primitive mindset where the supernatural virtue of faith hasn't yet been vitiated by formal heresy. As one advances in age, this gets less and less likely. I believe that the supernatural virtue of faith becomes gradually vitiated over time once someone reaches the age of reason.
With that said, however, I agree with LastTrad that I believe God's providence would put His elect clearly and visibly inside the Church. So there's some danger in Jesuit "casuistry" ... (i.e. "let's take the following case" theology). If someone dies as a 10-year-old Protestant boy, then I consider it all but certain that he was lost. So the type of speculation I engaged in above is useless. For whatever reason, God allowed this soul to dies as that 10-year-old Protestant boy, likely because God knew that had he been in the Catholic Church, he would have been more culpable for wasting the gift of faith. Nevertheless, it is clear that, say, a baptized 3-year-old Protestant boy dies a Catholic. And I don't believe that there's some magic about being exactly 7 years old, so that at the strike of midnight on his 7th birthday, supernatural faith ceases. 7 is just a rule of thumb. I swear that one of my kids reached the age of reason by 4 ... others, well, I'm still waiting for, at the age of 18 :-).