the westside connection's attack on new york was completely different than pac's... really, any hip hop fan should know this if they're serious about the music.
ice cube never got much press from east coast based magazines and journalists, who for the most part snubbed west coast hip hop as beneath east coast both in terms of lyrical complexities and instrumental creation. the stereotype that all west coast artists are dumb gangster actors with nothing to say was propogated by most hip hop rags at the time, and so the westside connection attacked new york journalists, along with a few east coast artists who had made disparaging comments about the west (such as q-tip). people always say that wscg rode on the east, but that's just not true. if people stopped to listen to the content, they'd see that the only group seriously dissed was cypress hill, and that was because b-real had accused cube of biting cypress' concept for throw ya set in the air for his song from the friday soundtrack. cube had been on tour with cypress and heard the song, and then copied it, according to b-real. anyway, i digress, but the point is that there wasn't some blind assault on the east as a whole.
likewise, pac had a focused attack on bad boy, bad boy affils, and the other rappers who dissed him while he was in jail. pac's battle was not cube's, and cube's was not pac's. therefore, cube would have no place on hitemup, just as pac wouldn't on westside slaughterhouse.