Thats [sic] pretty shocking behaviour [sic]. Mormon values ?
Nothing whatsoever to do with any
“Mormon values”. That's just your own ignorance and bigotry speaking.
Not to speak for anyone involved in the matter, but of the two pictures, I would have used the one that they did as well. Not because the first one featured a girl who had the odd look of someone with Down's syndrome, but because it featured a girl who was not wearing the same uniform that the other girls were wearing, and who therefore broke the aesthetic of the image.
I have no idea why she was out of uniform, but I would bet that that was the reason the picture including her was not used, and that the fact that she had Down's syndrome had nothing to do with it.
Just look at these two pictures…
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It jumps out rather disruptively, at a casual glance, that there is something wrong with the first picture, because there is a girl that is out of uniform. You have to look much more closely and intensely at the picture to notice that the out-of-uniform girl has the look of Down's syndrome. If she was in uniform, I doubt you'd notice the Down's syndrome.