People keep jumping on him, but really if that's how it was understood, what makes it any different than being a real insult?
I've heard plenty of times that, "It doesn't matter how you use the word, it matters how it makes someone feel". For instance the word "Thug". Even using it to describe a hardened, in jail 30 times, criminal. If they're black, describing them with that word is still racially charged. Even if that's not the intent.
Just as this comment may have been sarcasm, people may actually be mistaking this as a cold hearted, calloused, jab at the death of a cop. Which makes some people upset.
Now I'm not saying that every single person using this "opportunity" to attack this girl thinks this. I'm just presenting it from another viewpoint.