"IMO the church in the picture is just comically unserious, not comparable to the Gnostic ruins."
The Cathar castle ruins look mysterious to us now because they have been ruins for centuries. Hypothetical True Leftists centuries from now looking at the future ruins of the pictured church above should find them just as mysterious.
Do you at least agree that if our only choices are either the pictured American church above or a Western church such as (from one of the replies in the Culture Critic thread):

Jesus would choose the former to preach in?