I understand [Roman] Catholic "faith" well enough. Better than many "Catholics".
If one cannot put their finger upon what "desecration" occurred --- then how can it be said to have occurred?
Words have meanings. RadTradCats (like SSPX'ers) taking offense or having their own emotions and ideas as towards what constitutes 'sanctity' of a Roman Catholic Cathedral, is simply that, --- their own ideas or views being upset or "offended", when the imagined offense cannot be explained.
What was objected to? (why am I having to explain it? this is ridiculous!) ...but the presence of a rabbi, speaking from near an altar, in a Roman Catholic Cathedral?
Is there ANYTHING else???
The rabbi was present there, at the approval of a presently presiding "pope".
What are the RadTrads telling us? That Bergoglio is not a rightful successor to Peter? If so -- then there goes the whole shooting match. Stick a spork in it, it's done.
Oh, well...I never did consider that the statement "all must be subject to the Roman Pontiff" was all that well advised, anyway.
Are you telling me now that you agree? If so, then one may need to adjust their view as to what "the church" is made of.
I don't believe that. Those who understand the Roman Catholic faith "well enough" are called converts.