It cannot be a Catholic Caucus because another religion is mentioned.
Read the Religion Moderator’s Guidelines to verify my judgment.
Mohammedanism isn’t a religion. It’s a violent, murderous, totalitarian political ideology of satanic origin.
Can it be posted as a Marian Caucus?
It probably could've been created as an "ecumenical" thread:
Religion Forum threads labeled “Ecumenical”
Ecumenical threads are closed to antagonism.
To antagonize is to incur or to provoke hostility in others. Unlike the “caucus” threads, the article and reply posts of an “ecumenical” thread may discuss more than one belief, but antagonism is not tolerable.
More leeway is granted to what is acceptable in the text of the article than to the reply posts. For example, the term “gross error” in an article will not prevent an ecumenical discussion, but a poster should not use that term in his reply because it is antagonistic. As another example, the article might be a passage from the Bible which would be antagonistic to Jews. The passage should be considered historical information and a legitimate subject for an ecumenical discussion. The reply posts however must not be antagonistic.
Contrasting of beliefs or even criticisms can be made without provoking hostilities. But when in doubt, only post what you are “for” and not what you are “against.” Or ask questions.
Ecumenical threads will be moderated on a “where there’s smoke, there’s fire” basis. When hostility has broken out on an “ecumenical” thread, I’ll be looking for the source.
Therefore “anti” posters must not try to finesse the guidelines by asking loaded questions, using inflammatory taglines, gratuitous quote mining or trying to slip in an “anti” or “ex” article under the color of the “ecumenical” tag.
The original article doesn't seem (to me) to contain antagonism at the level of what I expect of an "anti-" or "ex-" article.
(Especially as someone who doesn't now neatly fit into any of the most common Caucus labels, I also appreciate that such threads are open to posters who don't fit within a particular label.)