"We believed it before we didn't believe it."
Not all of those quotes are from 1850. Some are from recent history and many of those doctrines are STILL believed by many of the members.
To say they “no longer believe that”, is to deny that several current members DO still believe that blacks carry the mark of Cain and were “less valiant in the Pre-existence”, both of which I was taught at BYU less than 20 years ago. It is still part of LDS lay theology.
"We believed it before we didn't believe it."