When I read that the guy who shot up the Sikh Temple was an ex-military neo-Nazi skinhead, something in the back of my head whispered, “Didn’t DHS have a report about such people? And didn’t a bunch of Republican politicians and members of the wingnut commentariat complain that DHS was slandering veterans and conservatives by suggesting that there might be such a threat?”
Answer: Yes. And they managed to cow DHS into backing off. No, I don’t know that this act of terrorism could have been stopped. But I know that John Boehner wanted to make sure that it couldn’t be stopped.