It's Fred Phelps, the "pastor" of the Westboro Baptist Church in Topeka, Kansas. According to the Sky Report, he's been praising the work of the London terrorists:
"Oh, I am so thankful that happened. My only regret is that they didn't kill about [a] million of them. England deserves that kind of punishment, as does this country (America)."
Phelps, as many of you undoubtedly know, has been organizing picketing at the funerals of soldiers killed in Iraq, based on his presumption that the military is filled with "fags."
I used to think this guy was serious, but as it turns out, the whole Day-Glo placard deal is an act to cover an effort to bait people into starting fights with picketers. Phelps' wife, apparently, is an attorney of the "HAVE YOU BEEN INJURED? CALL NOW" variety, and they aim to sue those they piss off for assault.
You can read more of Phelps' firey neofascist invective here at his insane website. He's very excited, it seems, by natural disasters like the Sumatran tsunami and the recent hurricanes.
If the earth is ever hit by a comet or asteroid, I'm willing to bet that it lands somewhere in Topeka.