Before anyone here misunderstands me. I have no sympathies for MHFM.
However I think they made here a good point:

http://www.mostholyfamilymonastery.com/apocalypse.php

Martin,

The problem is they don't approach it in the proper, traditional, manner, which would be to quote the Fathers and other expert exegetes to ensure that the traditional interpretation of the Church is learned and presented.

The local Church of Rome (i.e. the diocese of Rome) is indefectible. That's at least "common" doctrine. Therefore many of the expressions used by the Dimonds are unacceptable.

The idea that the New Church is the Whore of Babylon I agree with. It's a whore because it is unfaithful. It is "of Babylon" for two reasons - viz. it is of the World, of which "Babylon" is the symbolic city, and also because the city of Rome before its conversion was called by the Church "Babylon". But this matter needs delicate treatment, which means laying out the dogmatic truths and then using only approved exegesis.

I make it an especial point to avoid anything having to do with the despicable Dimonds. Even the devil can tell the truth, or at least some of it, when he is forced to it, or when it suits him.

We must consider the source.