They are just a bunch of nuts from Westboro Baptist Church in Topeka, KS. They are led by "Rev." Fred Phelps. They have been involved in these kinds of ridiculous publicity stunts for ages. While I hate living near these morons home base, it's nice to be able to lay on the horn and give them the finger every time I see them. I'm proud to say I have been taunting and harassing them for over a decade.
http://en.wikipedia.org/wiki/Rev._Fred_Phelps