No simplification involved - it is a statement of fact. Additionally -
June 7, 1844 -- William Law, 2nd counselor in the 1st presidency, leaves the church over polygamy and Joseph's denial of it. Soon thereafter, he publishes the 1st and only edition of the Nauvoo Expositor, which claims 1st-hand testimony from several sources that Joseph was practicing polygamy, counter to his public denials. This was NOT an individual attempting to justify their "sin" John. As such is not one of your 'tainted' sources'.
In 1838,Oliver Cowdery is excommunicated, at least in part, for accusing Joseph Smith of adultery with Fanny Alger. He was NOT trying to justify his sins John
D&C 132 was written while emma was still alive - you may argue exactly when, but it states "52 And let mine handmaid, Emma Smith, areceive all those that have been given unto my servant Joseph, and who are virtuous and pure before me; and those who are not pure, and have said they were pure, shall be destroyed, saith the Lord God." I believe that the use of the PAST TENSE here makes it clear.
There are no simple facts in complex situations like the Reorganization of the church, which developed after all of the confusion during the Nauvoo period of church history and the rivalries after the death of Joseph Smith Jr. It has been a while since I have read the volumes of RLDS church history. The movement to reorganize seemed to be blessed by the Spirit, especially in gatherings of saints, but the individual leaders had greatly differing views about how to reorganize. As the process unfolded through many deliberations, certain leaders did not like the direction being established and left. But the testimony of the majority was that the Spirit was guiding them. In 1860, Joseph Smith III became a spokeman for that guidance. As with anything else, we need to know who, what, when, where, and why disgruntled persons made statements (which are gleefully quoted by Mormon-haters without regard for who, what, when, where, and why).