This black nutter killing a couple of white people is going to send the American nutty Right completely over the edge in nonsense and offensive claims. (I see that it seems they have no hesitation in posting the video, too.) Let's face it, as countless threads on American Right wing sites attest, a significant part of those on that side of politics have never gotten over having a black President.
In fact, even Andrew Bolt - not the greatest Australian exemplar for reasonable analysis of race relations, to put it mildly - seems to be endorsing some utterly nonsensical gut reaction from John Hinderaker.
As for gun control, it does seem to me that this is the type of killing that most upsets people: the senseless type by a person who, while not insane for criminal liability purposes, clearly has mental issues and nutty obsessions and uses a legally obtained gun. The less legal guns in circulation in a country, the less of this type of killing happens, no? Seems a formula pretty clear to most of the world, except Americans. (OK, unfair - some Americans get it.)