Ethan Shanfeld Instead of fighting hate with more hate, Dave Grohl and the Foo Fighters prefer to retaliate with disco.On Thursday, as the Westboro Baptist Church picketed outside the band’s show in Bonner Springs, Kansas, the Foo Fighters — dressed in all white as their ’70s alter-egos, the Dee Gees — drove by in a flatbed truck while performing the Bee Gees’ “You Should Be Dancing.”“Ladies and gentlemen, I got something to say. Because you know what? I love you,” Grohl said.