Have you read @Contra's article on Christian Nationalism? He does not at all frame it in terms of trying to force people to be different than they are. He merely recognizes that the magistrate has been delegated the authority over the sword by God, and therefore the he should recognize where that authority came from, rather than pretend like he has no higher basis for its authority at all.

In fact, he explicitly recognizes that the state has no authority or ability to "make people different."

We should always be careful we are interacting with opposing ideas in the way their proponents actually frame them, rather than erecting straw-men.

I am not a fan of the men he points to as leaders in the CN camp, and I am certainly less optimistic about how likely we are to move toward that kind of "magistrate holding the sword while on his knees" ideal this side of the parousia, but I cannot deny our duty to strive in that direction.

Moreover, @Contra explicitly says that this ideal will only come about via culture first being transformed by the preaching of the gospel. I certainly cannot fault that proposed pathway to reaching the ideal, even if it is never achieved in this life.