I doubt Salvie was directly involved with selling drugs. But he definitely financed dealers, was involved in the shakedown/street tax of dealers and probably got in on the p2p deals occasionally like everyone at that time was doing. I'm sure they were whispering lies about him,

Tommy Del and Faffy supposedly whispered lies all the time to Chuckie. I think Chuckie/Faffy/Tommy Del had more incentive to kill Salvie than Scarfo. Chuckie was running Philly for Scarfo while him and Phil were in AC with Yogi. Coupled with Chuckie becoming a drunk, the thing with his daughter and Salvies rise ON THE STREET in South Philly and DelGourno and Faffy in his ear, that's how it probably all got started.

People put too much emphasis on it was just Scarfo being a psychopath and yeah he had final say but there was a lot more poison in that group than just him.