I didn't even believe. I don't want to advocate manipulation but ul questions concerning Joseph's dishonesty about polygamy to his first wife and his marriage of other men's wives and marriage of a 14 year old may prove more fruitful than just saying wow polygamy is messed up.
To them, everyone is either TBM, hasn't learned the truth yet, or has some kind of personal failing laziness, desire to sin, allowed themself to be deceived by satan, etc. I still love my Heavenly Father and my Savior.
Thanks for pointing this stuff out.