It pisses me off, because I've already seen signs of my kid being slowly turned Christian by osmosis and peer pressure and even some school teaching. Just a few days ago he came home and told me "Did you know Christmas is Jesus' birthday?" I asked him how he learned that and he responded "We sang songs about it in music class!" He's already told me he believes in god and asks why we don't go to church. We need to get the fuck out of Indiana.
So how does this make you any different from her, if her kid started showing atheistic or islamic ideas?
The difference is I'm not teaching my kid anything about religion at his age, and I'd never think about trying to influence another kid's beliefs. I think that indoctrination of children into specific religious/spiritual beliefs is horrific. That subject should be a personal journey that doesn't begin until such an age as they begin to question on their own initiative.
Except you are. You're deliberately trying to shield him from an ideology that you don't agree with, or at least that's the way I'm reading it.