"Interesting. There must be a sociological reason for Catholics to be so predominant on the Supreme Court."
There certainly is. Many of us are Jesuit-trained masters of logic and argument.
And therefore you probably have more in common with our "protestant" founders than most...logic doesn't seem to be popular, as of late.
Many of the "mainline" protestant denominations today are flat out socialistic.
Maybe so. But the popular perception is that Jesuit Order is notoriously socially liberal (liberation theology and all that spirit-rot), and I tend to think it is for good reason.
Anecdotally I can tell you that two of the most socially liberal human beings I have ever known were both professors of Constitutional Law, one an excommunicated Mormon and the other a lapsed 20 year Jesuit priest. Yes, the former Jesuit was brilliant. But I sure wouldn't have wanted him on the Supreme Court. He would have been warbling "logical" leftist nonsense from an ideological perch somehwere to the left of Breyer.