if the religion that your children adopt is important to you and your partner, and you have a fundamental disagreement about what that should be, I'd strongly suggest really thinking about it, especially scenarios where giving your children the choice actually end up with them in the very specific place you didn't want them to be in the first place.
as intollerant as that might sound, if you have actual concerns about your kids being indoctrinated into Christianity, and you let them go to church, any time they get your perspective, you boil it down in many ways to mommy versus daddy. especially for younger kids who might not have the cognitive capacity to understand nuanced philosophical positions.
like, I think the ideal position is what King Kandy describes, but in that situation it looked like both parents didn't actualy have any disagreement about their child's future religion. if you feel a legitimate concern about your child being Christian, I'd almost say you probably shouldn't have a child with someone who wants them to end up that way.
also, I know I'm just parroting a bunch of stuff other people have said 😛