Well, Salva Ballesta is known for his ultra-right ideas, Spanish ultranationalist. I think his father was/is a member of the army.
He doesn't hide and he clearly appears in ultra-right web pages and magazines, clearly racists, xenophobic and anti-democratical. Unlike Di Canio, and unless I'm wrong here, I think he never raised his right arm like a fascist in a stadium.
Salva Ballesta insulted Oleguer saying that he had more respect for the shit of a dog. Here you have a pic of the Spanish flag in Franco's time (the one with that kind of chicken) and autographs of Salva. You can find many shit like this in google, if you want.
I wouldn't compare him with Oleguer. Oleguer is an independentist and he defends lefty ideas, but he doesn't go around insulting people for their ideas like Salva.
BTW, if you want the name of another idiot: Arizmendi o Nazizmendi, Valencia player.
Two candidates for the Nobel prize... rivers of intelligence in these 2 guys.