Most of us have, but this is not about the death of *just* one dog - it's about killing based on breed specific legislation. Your "anyway" seemed to imply, among other things, that it would have been a whole lot sadder if the boxer had died.
Just seemed like a rather blase response, and with your follow up post, it's kind of like posting in a thread where people are mourning the death of a beloved companion animal something along the lines of "But think of all of the children starving in Africa." The one has nothing to do with the other, and the only impact is to try to devalue what those who care are feeling.