Is that true? That the deciding votes were mormons? Is there any reporting confirming this?
Has to be. They are the largest voting bloc. They went in supporting the measure
Simple math.
But here is the closest I can find to a vote.
“With more Scouting troops than any other religious denomination in the country, the backing of the Salt Lake City-based church was significant for the Scouts.
Following church leadership, Utahs two main Boy Scout councils made up nearly entirely by LDS Church-sponsored troops and among the largest in the country also backed the rule change.”