Actually, one should be able to take the words of any one bishop when he’s talking about doctrines on faith and morals and apply it to all of them. That’s why the Catholic Church is called “Catholic” (universal). Doctrines do not differ from place to place or from leader to leader. Now, as to issues of fact, there can be differences, and are, e.g. is there MMGW or not? Does capitalism necessarily lead to over-concentration of wealth? Does socialism aid the poor or just make everyone poor?
Certainly, among protestants (“protest-ant”) there can be and inevitably are differences when it comes to doctrinal matters. It’s the very nature of it that there are. In this society, and in the west generally, Protestantism has been around a long time and has had a profound effect on the culture. When, as in Protestantism, individual interpretation of the scriptures is considered equally valid for all, despite obvious differences, then naturally, those who hold to that subjectivism will be inclined to see differences in other things whether they objectively exist or not. That’s why, for example Nietzsche declared the “Death of God”. He didn’t mean God literally died. He meant that relativism had so suffused western culture that people no longer believed in “principles” (objective truth) and instead believe in “values” (truth as I see it).
None of the bishops cited so far has contradicted what any of the others said. One can pick some sentence or other that isn’t the central point of what another is saying and “interpret” it as being the main point. But if one is accustomed (and willing) to discerning the doctrinal statement among the dicta in the context, it’s quite plain that there is no contradiction among them, as much as one who dissents from Church teaching anyway might want to see it.