First of all a new program can't come in here and demand acceptance.
Life doesn't work that way. Change takes time to accept.
These forums were exclusively 12 Step for years. We allowed other program methods to be included. Our first experience with this was when Rational Recovery first came through here with terrible trolls and they tore the place up. We had to really work through resentments and work so hard to find tolerance after that and it was not an easy task.
Our Rational Recovery, Secular, and AA members here have done it.
You will need to solve this or members will go not programs.
I'm trying to help, but the change has to come from you.
If you can't do it steps will have to be taken to stop it. It can't continue this way.
That includes members from all programs.