If you try and stop atheists from teaching their children atheist beliefs, it wont be long before the government starts coming to stop you from teaching your children Christian beliefs.
The compulsion/intimidation comes more from the atheists. Kurt Goedel, one of the great mathematicians, became as a student of Leibnitz, a theist, but as a shy man was ridiculed and even lost students because of the intolerant climate of Princeton. Many people who have abandoned the classical two-tier universe
for the Flatlands of scientism, literally cannot rise above that level when confronted by situations that demand they question the received wisdom. To put it another way, in the land of the blind, the one-eyed man risks getting his eye poked out.