Lots of people on the left want to kick the right wing's ass. But we can't just use the model of the right. We have to be smarter. Whose ass do we kick? What methods work? Who supports ass kicking?
TL;DR: Rush doesn't like it when his own words are used to show what an ass he is.
No wonder he's sending out his attack dogs.
Limbaugh's decision to publicize the personal information of volunteers who encourage his sponsors to drop his show highlights his fears over bleeding sponsors, stations dropping him.