It’s not misinterpretation. It’s a shell game using words to change the what the original author had in mind. Heretics and schismatics were called heretics and schismatics for a reason and that reason was to exclude them from the Church. Today heretics and schismatics are separated brethren who are part of the Body of Christ. I’m not complaining about that. I think it’s a wonderful realization. Why didn’t the earlier popes realize this?
Shell game? That is a rather strong statement about theology, one that Benedict 16 certainly does not hold. And given that he is one of the best and brightest theologians today (if not the best and brightest), I would tend to pay attention to what he says long before I paid attention to any number of other people who seem to be “at the microphone”.
For starters, the Church does not consider current day Protestants to be heretics as was referred to the original founders of the various churches.
Did the Popes realize that? We can’t really answer that without a thorough and complete review of all of their writings.
What some people fail to understand is that when Pope speaks, he speaks to a specific issue from a specific point to be made; he is not likely to make a full exposition of all possible theological permutations and exceptions. He is addressing a specific issue with a specific response; other related questions which may not be occurring at the time are not being answered as they have not been asked. There is also the issue of prudence; if he is facing a major problem, he is not going to go off on side issues which could distract from the major issue at hand. That does not mean the side issues are not there; it means they are not addressed. It also does not mean they cannot be addressed at some future time.
Getting into a “he said it, I believe it, that ends it” approach to what has been addressed in the past is to presume that all possible permutations and exceptions have been answered. History alone should show that is not the case as the Church continues on to answer different, but related questions as time passes.
Keep in mind that the Holy Spirit continues to guide the Church’; that in itself should indicate that when the Church speaks about faith and/or morals, that if it appears to be contradictory, it almost always means that the person in the pew lacks certain understanding of the issue; either they have too little training in the matter, or the nuances are beyond them. We seem to have this idea that every word that issues from a Pope’s pen is meant to be understood by the least educated laymen. Where that came from I still have not been able to ascertain; but it certainly seems to be the operative foundation of a lot of questioning of, say, the last five Popes (( I had to include John Paul 1, even if nobody got much steam up about him).