I think that any religious denomination that believes their heavily religious oriented youth programs will replace the Boy Scouts as a popular organization to join will be very disappointed. The RAs and other similar organizations have existed for years and they won't suddenly appeal to youths they didn't appeal to before.
If a real alternative to the BSA is desired, they'd better band together and form a new organization similar to BSA that retains the traditional values of the BSA.
Any similar group that seeks tax exempt status will be charged with discrimination. The only groups that will survive are religious based groups because of the First Amendment.
“...they’d better band together and form a new organization similar to BSA that retains the traditional values of the BSA.”
You know, I was going to say that exact thing. But then it hit me when I read your comment - how would that new organization keep from getting sued by these destructive people?
Perhaps it would HAVE TO BE an explicitly religious organization.