On korn's cover of Ice Cube's "Wicked," I think they intentionally scream through some of the lyrics that may be inappropriate for a white person to say. Ice Cube's version goes like this:
We'll get Darryl Gates, but is Willie Williams
Down with the pilgrims?
Just a super slave,
We'll have to break his ass up like Super Dave.
Darryl Gates was the white LAPD chief during the King fiasco, and Willie Williams was the black mayor of LA at that time. The whole song is not about killing public officials, but pretty much every cut on that CD--"The Predator"--has some reference to killing the cops that beat King or LA officials.
I posited this question many years ago on the korn usenet group, but I was targeted for insults and nobody addressed the question.