Nothing has been "closed to opposing views", either in the past or now. You have always been free to post your own "open" threads (just as you've done here), just as you've always been free to challenge the status of devotional/caucus/ecumenical threads when they challenge by name your own religious affiliation or views.
But most curiously, you say "For years now I have seen threads...." You only joined FR on February 18th. Since you weren't registered prior to that, you could not respond period. Don't blame it on the thread designation.
There will be only two guide lines no personal attacks and no posting of numerous links in a response or making a point. If you can not argue a point dont respond by posting links. Yes I know that it is not part of the posting religious guidelines, but this is my thread so I get to make up the rules.
I predict this will turn out badly.
So far it's pretty funny.
Here, this will help:
So far.... No replies have been deleted.
Pretty unusual for a Religion thread.
What I think I need to do is to post a comment so as to offend the Religion Moderator.
So... with that in mind... in a few minutes you should see a post that was deleted. That will have been me.
(Just hope and pray that I don't go too far and get a huge time out)