Brings to mind a similarly horrific event in Tucson, Arizona a few years ago. A nutter called Jared Lee Laughner opened fire on a political meeting. His main target was Democrat Gabrielle Giffords, whom he shot at close range. Miraculously she survived. Tragically, six others did not.
In the immediate aftermath of this ghastly massacre it was suggested that Loughner was motivated by a Sarah Palin ad that displayed crosshairs on a map to denote areas targeted by a Tea Party campaign. Not surprisingly no causal link was established. But that didn't stop numerous pundits and politicians across the western world from piling onto Palin. Truly disgraceful stuff.