I think the 'debunked' means that when GOD gave the Mormons polygamy, it was to be for a LONG time - like FOREVER!
When their leaders CHOOSE to go along with the Supremely Powerful United States Government, instead of waiting on the ALMIGHTY to smite the US officials; it showed how much they REALLY thought their GOD was behind them!
I don't know if polygamy is commanded by God in the Mormon religion or not, but I do know they are required to follow the laws of the land except where it conflicts with a commandment from God. So, if it was a commandment, then they have some splainin' to do. If it wasn't, then I wouldn't think there would be an issue.