IMHO, it all goes back to the media's coverage of Hillsborough, in particular the Sun newspaper.
As a fan who often attended City away games in that era, the Hillsborough tragedy was always going to happen somewhere, at a game with a large travelling fan base.
Bear in mind, that attending away games was easy then, usually just pay on arrival at the turnstile. Wake up Saturday morning, phone around, pile in the car and off you go: stopping at a pub on the way for a beer or two.
We once drove to Derby, lovely Spring day, soon into the Peak District Ashbourne road, we passed pub after pub with many City fans relaxing outside. The thing is we were late! We all agreed these City fans could miss the k.o.
We arrived on time.
I often think about that same scenario years later culminating in the tragedy at Hillsborough with late arriving fans, pushing and shoving and incompetent plate policing. The responsible Liverpool fans who arrived early were just innocent victims of the late arriving hordes demanding to be admitted.
The truth will never be admitted on Merseyside, it's unpalatable.