The part of about the MO. wildcats and poison water can not be ignored of disturbing the indians and the settlers would cause anyone to be jumpy. So those living in that area took things on their own instead of listing to council!
There is no proof except heresay that the “wildcats” did anything at all to instigate the Massacre. It was simply the “public relations” campaign of the day. There is not one shred of proof.
There is proof however that Johnstons Army was marching on Utah and the general feeling among the Mormons was war.
You can use that angle and you won’t get any disagreement by me.