We assume that 41.7 million women strictly adhere to the B4 movement.

You cannot make that assumption. That was the point of my post some 5-6 posts up.

Korea IS A monolith when it comes to a number of factors. Culturally Korea is the antithesis of “diverse”. My point is that America is nothing similar to Korea culturally to pull this off.

Further just because they voted for Kamala is not a marker or evidence that they would even be on board with this type of response/campaign. So your number is flawed from the get go.

And the premise is self defeating. If you're refusing to have kids and teach them your beliefs, all you'll have are kids that belong to the other party. You will effectively just breed your ideals out of existence. This is one of the primary reasons that most religions are still around, they tend to (statistically) have van loads of children.

This also ignores the fact that those who would be willing to participate in such a campaign were likely to never have or have few children. Where-as those who disagree with this type of stance are going to be the religious types that statistically have more children anyway.

So let's take your example and apply more relevant controls on it... You'd at best get maybe 30% participation. And that 30% would be most likely to only represent 0-2 children over their lifetime. I bet after accounting for that you're closer to maybe a decrease of 10-20% birthrate... and you'd simply breed your ideal out of society in a matter of a generation or two.