Putting aside that these people are retards for thinking he's serious and that they massively overreacted... if you recall, your whole culture (certainly, appears to) celebrate guns, killing etc (certainly movies/tv, film, youth culture). Your armed forces have been at war overseas for hundreds of years. Relatively recently there was video of two good old boys laughing it up whilst shooting news cameramen from an attach helicopter with a 50mm gun. Your own police are now paramilitary organizations quite happy to use armed troop carriers, rubber bullets, tear gas, etc... on civilians.
So, doesn't it seem pretty much like the horse has not only bolted but has evolved into an entirely new life-form and is on a beach somewhere drinking Piña coladas? Hint: yep, it does.
For moderation purposes, troll != you-have-inconveniently-reminded-me-that-I-live-in-a-police-state.