I thought the Dice/O&A feud was mostly around Opie, first getting pissed that Dice went on Howard and then he heard Dice mention something about a radio personality having a dead dad and thought it was about him (I think it was actually Mancow Dice was talking about if I remember him talking about it after going back on O&A).
The Jay/Dice feud came up on my youtube recently and made me turn completely on Jay. He's definitely a thin-skinned faggot too but it seems every comedian is, it's just how long they can hide it.