I don't have the time answer all of your questions as an exmo, but I will tell you this - I served my mission in TN and KY from 91-93. Even before my faith collapse, I knew evangelical Christianity would never be a viable option for me. I saw how these people lived their lives in large concentrations, I familiarized myself with their interpretations of the Bible and other doctrine, and I interacted with them daily and felt their disdain (not concern...disdain). When they march into exmo spaces and attempt to "help" us TRULY understand the Bible, it's a non-starter. More often that not, we know way more than they do. One side effect of teaching us what was wrong with other Christian faiths when we were LDS is that when we lost our faith and trust in the LDS Church, it thrust the majority of us straight into secularism. It's extremely difficult to unsee the criticisms of most of Christianity we grew up with throughout our lives.