Saying that because there is a number of death threads makes it socially acceptable to mock the events is every bit as ignorant as the mocking is. I guess I shouldn't expect better than that from this society though, thanks for reminding me of that.
You know what? Poor taste or not, people are reacting to an article you posted. You chose it because of its extreme nature. You then did your best to promote it to other people. You yourself are forgetting that the victim is someone's family, and on top of the grief they are going through, they now have to deal with the fact that it is an international news story. This is something that you directly contributed to. How do you think the victim's family would react to YOU if they knew you had posted the story on a message board in a city a few hundred miles away? Do you think they would like the fact that you are using their tragedy to promote your doomsaying worldview? Do you think they would have any more respect for you than the people who made the jokes?
And for that what good are you doing? Is their something novel about graphic violence? Is there really a purpose to spreading it? Do you think people don't know we live in a violent world where bad things happen? Just because the concept is new to you, it doesn't mean that many or even most people didn't know it already. But because it IS new to you, and because you are struggling with it, you feel that everybody now has to be made to think like you. And you accomplish this by posting examples of human violence. And then you claim moral superiority.