Doomed from the get go because of the ridiculous nature of the original article.
AND from the first post aimed at Catholics.
AND deservedly doomed IMHO because it was made not as a real thread but as a (bogus) test designed more to provoke posts like Frumanchus than to have a real conversation.
This was a trap. The real benefit was for those who broke the rules to consider themselves to have an excuse to bash Catholics
It may not have led to much in the way of productive conversation because of the controversy surrounding the document in question...but that's not the point. The point is threads like this NEVER will so long as a particular group can cry victim and strong arm their way into the discussion to disrupt it.
I've had some particularly interesting and productive discussions with some Orthodox folks in the past, but without fail those discussions get derailed and fall apart as soon as Roman Catholics push their way in and go on the offensive.
It seems as though productive ecumenical discussion is only allowed if they are the initiators and they get to steer the discussion.