The Mormons change their doctrine and position with the culture. They did it in 1978 with blacks and now are changing it on homosexuals. They will likely support gay marriage soon.
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Yep. The 1978 “revelation on the priesthood” (allowing it for blacks who up until then carried the “mark of Cain) came about because of public pressure. They also did it with polygamy with their 1890 “revelation” stopping the practice.
For the last 15 years or so, they have been getting pressure from the GLBT who have left/been excommunicated, and more public pressure after the Prop 8 support. I fully expect within the next 10 years or so they will have a “revelation” changing their stance on homosexuality.