His crime this time? Playing into this whole "Obama is a sissy" stereotype that drives me crazy. From his broadcast on August 20th:

Obama's patriotism is not being attacked in an ad. McCain's just out there saying he's putting his own personal political ambition ahead of the country's. It's -- you know, it's just -- it's just we can't hit the girl. I don't care how far feminism's saying, you can't hit the girl, and you can't -- you can't criticize the little black man-child. You just can't do it, 'cause it's just not right. It's not fair. He's such a victim.

Oh, Rush, you are just a never-ending fountain of ignorance.

(Via Media Matters)