Americanism was and is a bit of a red herring. It is not that Americans seek a divergent morality (although there are those here who believe in reform, as in Europe), but that how a constitutional republic reponds to such issues needs to be considered, although the latter was soft pedaled until Dignitas Personae made the ”heresy” a matter of canon law. No Democratic politician as had the skill to link abortion pluralism with Dignitas, but I suspect some will. They should certainly use it to then explain the details about Roe as constitutional rather than legilstive issue to Rome and why its repeal would represent Catholic mob rule.