I don't believe they are. They are a christian organisation that only allows protestant members. They do not catholics but rather are opposed to catholicism as they are opposed to other religions. Stephen Fry & Christopher Hitchins are very much anti-catholicism, are they sectarian?
Honestly, they should put one of your articles in a time capsule. Just imagine folks faces when they read the doubletalk whitaboot pish some people actually voiced in the early 21st Century.
Me? I contribute every so often when the torrent of blinkered nonsense becomes too much to read anymore. Imagine there was a Medro from the other side. Daily threads about the army torturing civilians and Rangers tax case. It would be just as dull.