A friend recently switched from Baptist to Mormon. This has greatly distressed many in his family and community.
I think it’s best to raise kids to think critically about these issues, so as to be less gullible regarding superstitions and competing religions (particularly the more insidious, family splitting kinds). Skepticism generally is the best way I can see to impart these critical thinking skills - atheism being a natural flow on conclusion from skepticism.
Remember parents, if you train your kids to believe what men in suits behind podiums tell them, then you’re setting them up for recruitment into a different belief system.
Children have a built in instinct to believe things on authority. The goal of a parent should be to guide their child through a process of growing up and maturing, leading them to think for themselves and not just follow authority (an adult trait). Religion seeks to infantalise adults, encouraging them to simply accept authority like a child.
I don't know whether my friend's switching religions is a sign that he is beginning to question the authoritative declarations from his childhood, or whether he has simply descended to a more infantile state under what I consider to be a more authoritative religion.