That’s your problem. You’re living 120 years in the past. You’re saying that because we were polygamists (because 10-20% of the church was into the plural thing) 12 DECADES AGO, that somehow TODAY we are EXACTLY the same as this FLDS cult today.
This may shock you, and it may be difficult for you to wrap your mind around, but here goes: I did not live in the 1880s. Or 1870s. Or 1860s. The last time I checked, it is 2008.
If you're talking about 12 decades ago, then I'll go with B. Carmon Hardy's number: 20-30%...
...because we were polygamists (because 10-20% of the church was into the plural thing) 12 DECADES AGO, that somehow TODAY we are EXACTLY the same as this FLDS cult today.
Well, let's telescope this closer to our age, then, eh?
Let's start with your 120-year ago assumption:
1890-1910: LDS leaders solemnized at least 260+ known plural marriages in the post-manifesto years when the church was pretending to be 100% against polygamy (source: Hardy, A Solemn Covenant, 1992)--including dozens by LDS leaders like by apostles Taylor & Cowley (later ex-communicated) or by Ivins in Mexico, who was rewarded for this & made a general authority in the early 1900s, or by others who became general authorities after solemnizing such plural marriage vows. [So that gets it down under 120 years to the 98-118 year range...lots of living Mormons' grandparents & great grandparents]
Early 1960s: Hardy cites a poll taken of mainstream Mormons: 40% say they would engage in polygamy if told to by their "prophet." Then, LDS apostle Bruce McConkie’s book, Mormon Doctrine (pp. 577-579 of 1966 edition, which was approved by the LDS First Presidency--unlike the initial late 1950s version which was not...McConkie says that polygamy will return to the Saints before Jesus returns. [Now we're down to under 50 years...lots of Mormons' parents & grandparents...plus I don't think Jesus returned "12 decades" ago, did he?]
1998: LDS “Church Handbook of Instructions” for LDS bishops: “A deceased woman may be sealed to ALL men to whom she was legally married during her life.” (“Sealed” in this case = sealed for all eternity to her multiple husbands, making her a polyandrous woman) [This sounds like your generation doesn’t it? If the LDS Church did not want this proxy sealing practice being done in its temples, it has total authoritative ‘say-so’—as it does in shutting the door on proxy baptisms in the cases of Jewish Holocaust victims]
Also current practice:: The LDS Church, as mentioned above, still allows a husband to be sealed in its temple to multiple wives (but only one "on this earth" wife at a time). In these cases, we're talking about men who have been serially married to multiple women--none at the same time on earth--but whom would be part of a heavenly harem if he makes it to the celestial kingdom. If the Mormon church was serious about "eradicating" future polygamy, it would ban the temple ritual for eternal sealings for a second wife. It doesn't. It views itself as the polygamous “feeder system” for eternal life family life. (Besides, which LDS leader is going to ex-communicate Young in the life beyond with his hundreds of wives?..57 "for time" and about 150 sealed to him "for eternity?" Or any of the other LDS leaders like Smith...who had over two dozen "for time" and a couple hundred "for eternity?") [With this practice, we're not talking about "the 1880s. Or 1870s. Or 1860s. The last time I checked, it is 2008"--and this is still current LDS temple mainstream Mormonism!]