Forcing people, by militant means if necessary is so far from God's plan for us it is a sick, sick, sick thing. God NEVER forces us into anything. We are given the freedom of choice. Adam and Eve had the freedom of choice. This theology is NOT OF GOD. Period.
It's even more subtle and pernicious than that, and a danger to the Body of Christ herself.
This was something Roger Williams warned of 'way back in 1644. He was the person who first coined the phrase, "wall of separation between Church and State," and his point was to protect the purity of the Church.
This is what Roger Williams pointed out, referring to the history of the Church up until his own time:
When the Bride of Christ gets into bed with the king, she's given the benefit of the king's sword for her own protection, true. But she also is now obliged to justify all the other uses the king puts his sword to.
This is called the "chaplain effect" by Rodney R. Clapp in his book, "A Peculiar People." Chaplains of military units, chaplains of sports teams, chaplains of congresses are obliged to bless what those worldly organizations are doing, they are not free to obey Christ...if they want to retain their favored positions.
Once the Church has been integrated into a worldly state structure, it has to live by the rules of the world, not the rules of Heaven, and Roger Willimams pointed out that is exactly what has always happened. The king says, "We must go to war, right priest?" and the priest says, "Amen!" It almost never happens that a king says, "We must go to war" and his captive priest says, "No."
And then, there is the problem that when the favor of the king makes being a Christian socially advantageous (or even socially necessary), then ambitious people who are not truly Christian will join the church merely for its social benefits. Because those people
are ambitious, they will seek and rise to leadership positions in the Church.
Jesus has made it clear that only a minority of people will accept him. That means if
everyone is forced into the Church,
then most people in the pews will not be Christians. Actual Christians would be only a minority in the Church.
There is no getting around it. Only by keeping Christianity socially disadvantageous is there a hope to keep the pews filled with people the Holy Spirit put there, rather than man's ambition or the king's sword.