I suppose you’re referring to the polygamous sects?
If so...
Let’s suspend the current reality for a minute or two and go back to the late 19th century...
Do you think, that if the “true” SLC mormons weren’t “convinced” to abandon their then current practice of polygamy that anything would have really changed?
Do you think the “doctrine” and the purported “revelation” of polygamous marriage would allow the mormons to treat these young girls and the “lost boys” any differently than the polygamous sects currently are?
There are already numerous recorded instances where young, attractive converts were identified as “wives” for the “elders” in SLC...in fact, some correspondence admonishes some of the missionaries for “marrying” them before the women arrived in SLC...
I don’t “hate” mormons, would be kinda hard to live with the two who I share my home with...my wife and son. But I will and do challenge their doctrine...
Do you also challenge the today’s Roman Catholic Church by her history?