One could argue that advocating against firearm control and regulation has resulted in significantly increased societal harm, which could also be identified as not fair, if not even evil/hateful, especially from those who have directly suffered from it.
Of course two wrongs don't make one right, and people can be more classy than this, but it's a totally understandable sentiment and response.
Of course two wrongs don't make one right, and people can be more classy than this, but it's a totally understandable sentiment and response.