Having an unemotional response to such a horrific act is sick.
There is difference between lacking an emotional reponse, and being in control of that response. I have the same knee-jerk reactions that end in violence as most sane people, however I'm in control of them and they stop at being mere impulses.
That includes putting said reactions up for public view. Being a fully adult human, I'm capable of recognizing my baser instincts as being baser and dismissing them before I start typing. It beats engaging in revenge porn any day of the week.