Alot of people are bothered that Trump won Utah. A couple things to keep an eye on.
In 2012, Romney won Utah with 740k votes. In 2016, Trump won with 375k. In 2012, a million people voted, in 2016, only 700k did.
So the reality is that trump did 50% worse than Romney, and the top drop in support came from disenfranchised voters who didn’t vote for anyone.
If we estimate Utah voting population growth for the past 4 years at 2% a year (which per the census would be very conservative) This would mean almost 400k people who would have voted, based on 2012 rates, didn’t. This is more votes than trump received.
So the Utah reality is that Trump won for a number of factors, but none of those factors was massive Mormon support for him.