Being an Atheist parent in a Christian land

[R-e-n-n-a-t]

You did the right thing. If they encounter Christians, Muslims, etc, then they will not have a balanced point of view unless somebody also shows them the atheist pov. I've heard of too many atheist parents who try to let their child make his or her own decisions, only to realize later that a teacher or grandparent has taken advantage of this to brainwash them without opposition.