That's not what you said. You said "The notion of that kid carrying an AR-15 into a riot doesn't pass a giggle test." Which suggests you had a problem with his even possessing a firearm in that situation, firing it notwithstanding. This in turn means you should have a problem with Grosskreutz carrying a firearm into a riot. Yet you excuse his firearm possession.
If you had said ""The notion of that kid firing an AR-15 into a riot doesn't pass a giggle test.", your comment here would make more sense. As it is now, you look like a hypocrite.