It's simply part of their overall agenda. They probably feel they've moved past the point where they needed to cozy up to the gun owners, since now many gun owners are voting for Democrats anyhow.
NeoConservative doctrine doesn't believe in an armed citizenry, unless those citizens are on the gub'ment payroll. It's all about making sure their side is the only one with weapons.
You do know there's are fundamental differences between what you're describing and the ideology of the five conservative justices on the Supreme Court, right?
For example, do you even remember Scalia utterly bashing Bush & his NeoCon ubergovernment ideas in Hamdi
...an opinion he was joined with by Justice Stevens?