However, the priest also has agreed to operate within a certain system and should abide by his promise. This doesn't meant that he shouldn't agitate for change in the relationship between Catholics and Protestants.
The best change at this point would be a clarification of the contradiction. The Pope talks of respecting the religious convictions of these separated brethren. Obviously, the most critical part of that line is the word "brethren."
The last I checked, the "brethren" brought about my Dad & Mom were part of my own family.