I would be more concerned, were I you, about things unknown. That is, the real questions you face are deep questions of psyche and behavior, not cheap stereotypes.
Still, the emergence of these sentiments at this time, in American society, is unsurprising. That is to say, Bowser, you're going to find yourself amid a weird small movement that will largely be composed of people who used to fear Sharia law in the United States as something that somehow had greater chance of taking over America than Christianist theocracy but, now, finding themselves empowered, need to impose their own religious supremacism on society. Beware of these; you'll find them all over the marketplace that murmurs and buzzes about the political prospects of Shari'ah in the United States, and they have very little to say that can be counted among what is honest.
Don't the Mormons break many laws?
And don't many authorities look away?
How has that turned out?