And I would contend that firearms surely belong to Caesar, not to God.
But of course, that’s an aside.
Caesar is not God, and only a fool tries to turn him into God. Similarly, the state is not a creation of God, it’s a creation of men and we employ it in our interactions with one another. The secular state is the preferable state because at the end of the day we are each given the choice to *choose *God or not to choose God.
If Christians were to employ the state to enforce religion we’d be committing a great wrong - not only because of the suffering it would inflict on those that disagree with whatever orthodoxy the state chose, but because we’re depriving those people of that essential and fundamental choice that Christianity is all about.
Liberty is an essential condition for the healthy presence of Christianity. ""For freedom did Christ set us free: stand fast therefore, and be not entangled again in a yoke of bondage. - Galatians 5:1.
You cannot contend that Jesus would have proposed a state that would go about confiscating firearms. You could contend that he might preach against their use and possession of them, but it’s not square with what we know in the Bible to suggest that the establishment of an all-powerful state apparatus to enforce bondage is kosher.
We will come freely to God, giving ourselves, or not at all.