The Senators and Representatives before mentioned, and the members of the several state legislatures, and all executive and judicial officers, both of the United States and of the several states, shall be bound by oath or affirmation, to support this Constitution; but no religious test shall ever be required as a qualification to any office or public trust under the United States.
EXACTLY.
Moreover, there is no reason whatsoever that the SCOTUS should look like (sex, religion, etc.) a cross-section of Americans. The whole idea is to get people on the court that are wiser than the average joker, and know the Constitution. Your average joker is (unfortunately) neither very wise, nor sufficiently familiar with the Constitution.