Question: After Jerry shuts off No Vaseline, MC Ren asks Eazy E "who work for who?" What did he mean by this?
Question: Why did Suge Knight hate Jerry so much? They didn't even talk to each other at all in the movie.
Answer: Suge Knight saw Jerry as a threat, and rightfully so. He had control over E and the others, and knew far more about the business than he did. Which meant he had power, something Suge wants complete control of.
Answer: The song is mostly about how Jerry and Eazy screwed the band over, with Jerry taking the lead. Ren is asking "Do we work for Jerry or does he work for us?"