He needs to watch the South Park episode it is a clincher.
Yeah, I thought SP take on Mormonism was dead on. And in the end it summed it up-— yeah, it’s all a little nutty and fantastical (what religion isn’t?), but if you get past the silly superstition and myth and use the philosophy within to guide your life in a positive way for yourself and those around you, what’s the problem?
South Park did a fantastic job AND ended with “who cares our life is a good one.”