If the 2nd only restricts the federal government from disarming state militias as the 7th's decision implies, then the Heller decision wouldn't have nullified the local D.C. government's handgun ban. The 7th circuit's decision is itself a violation of a right that was just upheld by the highest court in the land last year. As I said before, unbelievable!
The 2nd Amendment was simply a clarification that the power to restrict the right to keep and bear arms was NOT delegated to the federal government. Like the rest of the Bill of Rights, it was written to prevent "misconstruction or abuse of its powers" by the federal government.