In 2015 the Supreme Court was 7 Catholics and 2 Jews. 0 Protestants. It’s insane that it worked out like that. Some of it can be explained by demographics I guess, Justices tend to come from the northeast where there are more Catholics and Jews. Even then you’ve still got Clarence Thomas. What proportion of black people from rural Georgia are Catholic, 0.5%?
It hardly matters, but it is quite odd.
I'd always assumed that Clarence Thomas was a convert from Protestantism to Catholicism, but it actually appears that his grandfather (who he was living with) converted when he was a child or teenager. So, he was raised Catholic from that point on.