Heartland posted a billboard a couple of years ago pointing out that some of the worst mass murderers in US history were climate activists. The left was outraged and said Heartland was smearing a broad range of people over the actions of a few.
Yesterday, some psychos went on a murder-suicide rampage in Las Vegas, so Eric Holder immediately responded by promising to investigate conservative groups. And every murder is the fault of the NRA. And every storm is the fault of the closest skeptical politician. And Obama says that everything bad in the world is due to George W Bush.