You’re kidding???! Kyle who thinks he’s entitled to ALL of Cartman- it’s only fair!! -because of all that Eric’s put him through, as a sort of twisted retribution. Along with a generous side helping of self righteous white knighting in the form of ‘they don’t know how to handle him like I do!! I need to keep those poor people away from him!!!’ to justify his paranoia and possessiveness? It’s written into his code