I think several things would have become public knowledge, but the one thing that would likely have been most noted would have been the practice of the LDS church not allowing attendance at temple weddings by friends and relatives, even parents, unless they paid the price for the "temple recommend" by being "worthy". Imagine, forbidding parents to attend the wedding of a child.
Mormon practices are very strange. I think that’s something Mormons have got to work out for themselves. But in terms of Romney - who I suspect was probably not a great Mormon in recent years, although he was apparently a Mormon bishop - I think it was reasonable to ask him about these things, and his screaming “prejudice” was not an okay answer.