From many Protestant points of view the "Catholic majority" existed when Rhenquist (Lutheran) and O'Connor (Episcopal) sat with three or four other Catholic Justices.
I took a quick look at past lists of justices according to professed religious affiliation (note that "professed" although we know many of them were truly in league with Satan, heh, heh) and I didn't catch any earlier Episcopal/Lutheran/Catholic combinations that yielded a majority like that unless John Marshall's Anglican dominated bench did so ~ but I think there were fewer judges in those days.
Today's court with 6 members of a single denomination is very unusual. We don't even have an Orthodox member ~ not sure we ever did ~ long overdue.
>>The “Catholic majority” thing was reached when Alito was seated.
From many Protestant points of view the “Catholic majority” existed when Rhenquist (Lutheran) and O’Connor (Episcopal) sat with three or four other Catholic Justices.<<
I did know that - I meant this secures that majority.