The Mormon Church has historical experience in low-intensity conflict, has members surprisingly embedded in diplomatic circles, has experience in power projection, and is fucking rich.
Mormons aren't just going to be soaking, but soaking in Amish blood.
Spot on though. The Mormon church has connections and infinite money, rivaling the Catholic Church in terms of wealth (and only increasing by the year). Their current estimated value is over 200 billion, in real estate, land, and investments. They own significant holdings in farmland all over the country including 1% of the entire landmass of Florida.
Historically speaking, the church already went to war against the United States, and attempted to assassinate a governor (unsuccessfully). 1800's Mormons were nuts.
Obligatory note - I grew up Mormon. I don't recommend joining the church. Their beliefs are objectively incorrect and oftentimes harmful. They have a cool history though.