Gregory needs to be prosecuted for this immediately. There is no libbie excuse that voids the law. Just because he was trying to use it as a prop to defeat our Second Amendment rights does not make it legal. If he is not prosecuted, DC needs to be sued for a violation of the equal protection clause.
As far as this 'greater good' moral justification garbage, how far does that go? There are plenty of liberal politicians that could be removed from office and thrown in jail for the greater good. Starting a revolution could be seen as for the greater good, especially with the maggots we have leading our giverment.