Sgt Slaughter- back in the early 90's as a heel, Iraqi sympathyzer during the invasion of Kuwait. Reportedly, WWF had to call off plans where they had Wrestlemania booked and change venues because of death threats against Slaughter. People hated that mofo traitor!!!
The Koloffs- Ivan and Nikita! Bad-ass, tough, feared, oldschool communist Russian heels! They had the chains, they'd cut promos with their Russian accents always drawing heavy boos from the fans! The angle biting from the whole 'cold war' USA vs USSR conflict. These guys drew mad heat everywhere they went!
Nikolai Volkoff- ^^^pretty much same as Koloffs with USA vs USSR angle. ALthough he did go the extra mile to piss off fans by taking the liberty before matches of singing his Soviet national anthem lol!
The Iron Sheik- Hated by the fans because he was middle-eastern, Iranian, Muslim -which all are commonly associated by the average American with terrorism! Not to mention all of the early airline hijackings that were taking place during the Iron Sheik's career. During Sheiks run, I was a kid who knew nothing about politics and terrorism, but even I hated his ass as a kid!
Anybody notice a trend with all these angles that drew the most heat?