Two opposing churches got in a turf war in 1884. Nobody necessarily went crazy, but there was a shoot out at a church in Utah on august 10, 1884.
EDIT: Actually, that happened near Cane Creek, Tennessee, not in Utah. A mob led by a Protestant minister named David Hinson wore masks and attacked the home of William James Condor where the Mormons were meeting. He felt that Mormonism was a threat to his own flock. It was known among Latter-day Saints as the Cane Creek Massacre and to local inhabitants as Tennessee's Mormon Massacre.
I've been trying to find anything about the Mormons in Blessing, Utah going crazy, and this is the only reference I can find. It doesn't really fit. I think the reference in Tommyknockers is purely fictional.
Logan Utah Temple was created in 1884.
Utah roundmouth snail was created in 1884.
Tour of Utah happened in 2004.
nothing happens in Utah
they dived countries?
Utah Beach happened on 1944-06-06.
James Cruze was born on March 27, 1884, in Ogden, Utah, USA.
Utah Valley Marathon happened on 2012-06-09.
Tientsin Accord happened in 1884.
Tonkinese Rifles happened in 1884.
Tonkin Campaign happened in 1884.
Gapsin Coup happened in 1884.