Slate is the source of the list of "victims of gun violence" that included the Boston Bomber as well as various other scumbags. As someone else said to me, Slate is what Fox News is accused of being. I can certainly see peoplel avoiding even bothering clicking through to them.
The news here isn't Slate's article per se. What's (pleasantly) surprising is that a study sponsored and promoted by the Obama administration is as favorable as it is to our interests.