Pretty much what waka said, he was the first and most important victim of lyors scheming and plotting.
You need proof that Rick Rubin doesn't like lyor Cohen? You obviously don't know the history of def jam and/or refused to read the honorable SKJs post that broke it down so do your googles homie. Rick Rubin didn't walk away from a million dollar company he started in a dorm room for the fukk of it.
What's the name of that thread?