South Park is all over this movie
I think the elaborate plot is based off of the famous 'Scott Tenorman Must Die' episode of South Park, in which Cartman pulls off an elaborate plan to exact his revenge on Tenorman by making him eat his own parents.
On top of that, Kimberly's father (James Woods) is spouting off nonstop about the Jews (ala Eric Cartman) and there is even a passing SP clip at the end of the movie when Kimberly is flipping between her movie and other channels.
Just my two cents.