Hi Q, and welcome.
Last summer two female missionaries came to my house and we had a very pleasant 1 hour conversation, mostly on my part, as I tried to give a nondualistic explanation of life, the universe and everything (is that a subtle reference here for The Hitchhiker's Guide to the Galaxy?, hehe). They were very open to it all, and I think it made them question their own firmly held beliefs, though probably for just a few minutes. At least they said they will have to think more about it, which to me was a positive sign. When they left I pointed out my neighbor's house two houses down, who are jw. I don't know if they went there or not, but was curious as to what kind of encounter it would have been if they did. Had a jw come to my door I am sure that they wouldn't have stayed to listen with the openness that these two young missionaries displayed.
You said, 'I guess when you love your church and someone else stops feeling the same way it feels a little like they rejected you.'
Yes, this is how identified we become with something outside ourselves. Those identifications give one a sense of 'self' that is comforting and when that sense of self is threatened we react, usually negatively. My question to people is to ask them to find out who and what they really - what are you before any identification with ideas and beliefs has been made? Who and what are you without anything to hang on to, to identify with? Discover directly for yourself what you are without any reliance on someone else's interpretation of god, the world, or self. When you discover for yourself what you really are then notice what happens to suffering and separation from 'god' and others.