I nominate PETA, long as we're engaging in paranoia.
I wasn't engaging in paranoia so much as sarcastically bracing for the news media's fixation on the gun aspect (and by association, the right-wing aspect). At this point it could be terrorists, left-wingers, right-wingers, jilted lovers, crackpots, Al Gore, etc.
I'll see your PETA, and raise you an ALF and Earth First!