One of those outrages, presumably, was Joseph Smith’s…

““One of those outrages, presumably, was Joseph Smith’s vocal opposition to slavery, and the governor’s executive order was the culmination of years of anti-Mormon sentiment, spurred by what were perceived as Joseph Smith’s designs on taking over American civil society. A manifesto written and signed by hundreds of Missourians, including elected officials, had preceded the extermination order, calling Mormons “a pretended religious sect,” and “deluded fanatics.” Mormons, then, have had foundational and horrifying experience with some of these worst impulses of mankind and became both refugees and immigrants in our own land. And so when someone starts talking of religious tests and religious bans, we know better. Because we have seen this all before. When we say “No Muslims” or “No Mexicans,” we may as well say “No Mormons.” Because it is no different. That kind of talk is a dagger in the heart of Mormons. It is a dagger in my heart. Because we know firsthand that America was made great not by giving in to these impulses but by fighting them, and defeating them. Governor Boggs’s Mormon ban was officially on the books in Missouri for 138 years. Thankfully, cooler heads prevailed long before it was officially rescinded in 1976.””

— Jeff Flake