I do not remember Bills fan defending OJ. I once got thrown out of Annacone's after an impassioned speech at the bar in defence of O.J. that led to a fight between patrons who I was able to sway and those who stood firm. The bartender, who was a bit of a twat, threw me out instead of any of the people who throwing drunken haymakers.
But the point is that not a single person out of a dozen (white, like me) patrons, all of whom were Bills fans, thought O.J. was innocent. I got maybe five to agree that he shouldn't be found guilty.