Today many U.S. Catholics and Jews think like Protestants. They believe that religion is something we choose as individuals rather than inherit as communities, and they view it primarily in terms of faith rather than practice. None of this comes from either the Catholic brain of Aquinas or the Jewish mind of Maimonides. The progenitor of this faith-based understanding of religion (who also happens to be the patron saint of religion rulings at the U.S. Supreme Court) is the American Protestant thinker William James, who famously defined religion as "the feelings, acts, and experiences of individual men in their solitude, so far as they apprehend themselves to stand in relation to whatever they may consider the divine.”
When Supreme Court justices genuflect before this subjective understanding of religion - and most, perhaps all, of today’s sitting justices do - they are thinking like Protestants. And there is little to suggest that Elena Kagan, whose bat mitzvah occurred in a Reconstructionist synagogue in Manhattan’s Upper West Side, would not go and do likewise.
So if you do the math more carefully, it may go something like: 6 Catholics + 3 Jews = 9 Protestants. Either way, we could use more religious diversity on the Supreme Court.
6 Catholics for sure do not translate into being even one step closer toward a Catholic definition of abortion in America.
And the only thing more Protestant than a Protestant is a modern American Jew.
I am not so sure that this is such a bad thing for America though.