Oh I don’t pay any attention to the lives of reality tv “stars” so I hadn’t even heard of that.
I hadn't heard of Christina Grimmie before that, but the shooting did receive a moderately large amount of attention. Then the other two Orlando-area news stories happened, and together they seemed to receive a lot more attention. I don't look around very much at social reaction, but I've probably seen more references to "two" recent Orlando events than to "three," and the Grimmie shooting seems to be largely forgotten. I'm slightly amazed that the Billboard open letter itself doesn't specify them, though the introduction (not quoted in this thread) does.