Is Rush Limbaugh's Chinese Rant Racist?

Wow. Whattaya do when a person you find reprehensible does something that doesn't seem all that bad, but other people seem to think is awful?  I mean, Rush Limbaugh is a xenophobic, homophobic, quasi-racist, semi-sentient pig. But you know what? When a dialect rings foreign to most of us, we hear gibberish. And when a dialect rings so foreign that it hits you like white noise, your reaction could be a wide-eyed bewilderment. But, if you're a media personality for like--what--25 years or more? Maybe you ought to know that this shouldn't be your reaction. . .