Help with understanding a rap qoute from 8 mile?

The part when lotto says" I feel bad I gotta murder the dude from leave it to beaver" is the part I get because beaver was a white kid from a suburban family, saying he's soft when there all hard cause he's white , but when eminem says" ward I think you were a little hard on the beaver so was eddie haskal Wally and ms.cleaver" what does that mean, also when he says to poppa doc "1pac 2 PAC 3 PAC 4 he's PAC your PAC no PAC none"