Mormon polygamy is not normal. Mormons donating 10% of their income also isn't normal. Mormonism has enough impact on a person that some Mormons can identify other Mormons.

And I think religious weirdness is one of the kinds of weirdness that people see past the most easily.

The thing that distinguishes religious weirdness is that it comes from a highly motivated place and isn't a random whim.

if one aims at public advocacy

I'm not exactly sure what you mean with "public advocacy".