---- There's no allegation here that the Wiccan boys had been trying to proselytize other troop members. ----
I say infiltrating a Boy Scout troop with wiccans is, by its nature, trying to proselytize the other troop members.
BSA is a Christian organization. If someone wants to form a wiccan, jewish, islamic or other religiously based group, they are free to do so in this country.
Read the article again. The regional executive director of the Boy Scouts said it's fine for Wiccan boys to be in a Boy Scout troop, and the district superintendent for the church denomination which sponsors the troop overturned the troop leader's decision to kick them out. The only person who wanted the boys out was this "Christian" troop leader, and he only wanted them out because they wouldn't lie about their religion.