So, am I accountable for what whites did to Indians at Sand Creek in the 1800s? Are you? Or are only Mormons on the hook for what their distant ancestors did?
If there were unknown people involved in that massacre, and you had journal entries implicating them tucked away in a massive vault in the Wasatch mountains, and you could focus on the guilt on the specific people involved, but instead chose to continue the cover-up, then you're more a part of the original problem than any redemptive solution.