We have to get it back, imo?
My thoughts...
If the goal is to encourage peaceful interactions between differing belief systems, putting in some cage match that will only incite aggressive tendencies and result in hard feelings isn't going to promote that goal.
I do agree as much with Sufi that sitting around singing Kum Ba Yah doesn't do much for conversation either.
There is a delicate balance, and it is one I found myself crossing the line and made myself take a time out the last time I was here. It wasn't intentional, and I certainly owe someone an apology, but the nature of conversation is that folks sometimes step across boundaries. As long as that is not intentionally hurtful, and the offended one isn't unwilling to forgive and move on, generally conversation can move along.
I found the most inclusive discussions were those that discussed big ideas, and answers were in the form of a question. Not as a "rule," but as a search for meaning and / or understanding. Questions invite participation.
Nothing kills a discussion like someone who is dead certain about whatever. Once someone's mind is sealed, there is no more two way communication, and discussion dies.
This place never has been about "who is best" or "which is most correct." G-d created all humans, and all human conditions, therefore all religions by extension. There are many paths up the mountain to return to the Father of all...nobody has all the answers, and none of the answers are complete. Each only holds a piece, and each individual only holds a piece of that piece, therefore none of us knows everything.
But we can share amongst each other, that is the blessing of this place.