The foul nutjob who shot up the Unitarian Universalist Church (apparently hating them intensely because they have the nerve to not hate anybody) is obviously sick in the head.
But it is also true that eliminationist rhetoric has become standard fare among the American Right. As long as corporate America keeps giving a forum and wealth to nutjobs who express their violent wishes verbally (like Ann Coulter, Michael Savage and Michael Reagan), a few other nutjobs will take the rhetoric seriously, and place those words into action.
UPDATE: I wrote the above before seeing this:
Bill O'Reilly, Michael Savage, Sean Hannity on accused shooter's reading list