It is the Wiccan's who would be preached to. Wiccans and other pagans generally abhor proselytism.

The crucial quote of the article being:

"Boy Scouts own the program but does not control the unit," said Legare Clement, executive director of the Boy Scouts for southwestern Louisiana. "We partner with community organizations and churches as sponsors to present the program, which is actually a youth outreach for them.

Penn & Teller dealt with the Boy Scouts of America in a recent episode of Bullshit.

The BSA operates quite differently to the Scouting movement in Commonwealth countries.