It went on that's a fact, not just with him either , viv Anderson was another one , and I could list a load of others ,man city goalkeeper ect.
I would say seventies to early eighties it was really bad and infact looking back ,I think the fans played up to it for a while , it wasnt a small minority either at times.
Although the likes of Chelsea, Leeds , ect were every bit as bad or worse, including the RS before he came , it was us that the reputation stook to.
Want helped by the fact most ,not all of are hooligan element were young white males ,and notorious hard on visiting ethnic hooligans from other teams.
No use trying to repaint history, it happened, but the club and the fanbase have moved on and unlike some teams we owned up to it and learned are lessons , today it's still there in small pockets ,like in the wider society but it's not widespread and certainly not the vast majority of are fanbase.
Cant take to Barnes at all , he has skeleton's in his closet as well, but I doubt he would own up to them.
But he is right on this , it happened.