The LDS Preparation for a Civil War

In 1857, a wagon train of immigrants from Arkansas is traveling through Utah by way of the Salt Lake Valley. They're carrying $50,000 in currency and all their valuables along with hundreds of heads of cattle to Los Angeles. But when they arrive at Salt Lake City, Mormon leaders start giving fiery sermons that Mormons are preparing for war or that Parley P Pratt has been murdered. There's no reputable reports that the people in this wagon train are violent, destructive, or confrontational; just worst case scenario.