Mormon nepotism isn't anything more than you see from other people around their things (church, schools, even sports teams). I lived and worked in Utah County of all places for years (where huge percentage of people are Mormon) and the majority try to be open minded, tolerant, and accepting. Now if you go around shitting on their most sacred beliefs or being an asshole, don't expect it not to affect their feelings toward you, just like it would any other human. I've also lived and worked in places where I was the only Mormon (or one of 2 or 3) in the whole group.
If your claim that being Mormon causes this nepotism (rather than say, just being human as I would claim), then it must be something about their faith that causes it. Where do you think that comes from? Can you point out a teaching or belief of theirs that would encourage this?
> They will always prefer hiring other Mormons, and they will use a bunch of bullshit reasons why they’re better than others as their cover.
You realize this is what all humans do right? We make decisions emotionally and then justify them rationally, even to ourselves. Frankly I find it disturbing that you advocate against actively discriminating against a group of people on that basis. You could easily s/Mormon/gay or anything else in there and it would be exactly as truthful/accurate.
Also, the "Mormon Mafia" is a joke, not an actual thing. For most it's a self-aware attempt at humor.