No mystery; revisionist history.
Same thing with multiple versions of the First Vision, Mark Hoffman and the items he sold to the LDS Church leadership as authentic. The missing DNA evidence of the BOM people...the horses, the steel, the massive battlefields in NY by the Hill Cumorah.
What Packer actually said and the transcript will probably differ, but who knows as he seems unashamed of his hatred; I guess by their fruits you shall know them.
Abram, there are links to the speech transcript on this thread, plus video of the speech at the linked web site. I used the link and read the speech, and didn’t find any hate. Just good coaching for a happy life. Peace.