A lotta people think that what I say on record
Or what I talk about on a record
That I actually do in real life or that I believe in it
Or if I say that I wanna kill somebody, that
I'm actually gonna do it or that I believe in it
Well shit, if you believe that, then I'll kill you
You know why? Cause I'm a criminal

from Eminem – Criminal Lyrics on Rap Genius

Meaning

Both The Slim Shady LP and The Marshall Mathers LP intentionally blurred the line between Marshall Mathers the father/husband and his murderous alter-ego Slim Shady who threatened to murder anyone who pissed him off. Therefore, Marshall Mathers has no intentions to murder anyone in real life, but if he were to do so he would target the idiotic critics that label him as a criminal just because he raps about controversial topics.

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