The trouble is Liverpool don't have an amazing fan base, they have exactly the same fan base as every other club in the world; some good fans, some noisy fans, some quiet fans, some old fans, some young fans, some fans from the local area and some from further afield.
What they do have though is a much, much larger contingency of knob heads following them than other fan bases, in large part due to the way they refused to take any responsibility for Heysel and the way the club dodged any and all allegations for their fans involvement.
This lack of accountability or remorse from the club then attracts the type of people who think that bricking opposition coaches, jibbing in to games to the point they're overcrowded and fans wirh tickets are locked out (Istanbul, Paris, etc), spitting at opposition managers, throwing pint pots full of coins into random crowds, etc, etc, ad nauseum is part of what it means to be a 'real' Liverpool fan. The fact that all these incidents are either enabled, covered up, minimised or dismissed by the club, the Merseyside Police and the media attracts the kind of people who enjoy doing this shit with impunity. At any other ground in the country would a fan spitting and throwing things at opposition managers be escorted to another part of the ground? Not a chance, they'd be rightly banned from the stadium.
Every club has its share of knobheads, we've got plenty of coked up fuckwits following us and plenty of people have jibbed in to games before but it isn't on a scale where it's a defining characteristic of the support of the club, or any other club in fact, as that kind of behaviour is either kept quiet so it's in small numbers like jibbing in or violent fans get removed and banned thus squashing this behaviour before it starts.
The problem Liverpool have is they need the club and the media to start calling out this behaviour but they're all so terrified if being accused of using the H word that they won't do it and so the behaviour continues attracting more fuckwits which makes the behaviour worse which then attracts more fuckwits continuing rhe whole sorry cycle.
What happened in Liverpool yesterday could quite literally have happened anywhere though but if the incident is as it appears, caused by alcohol, drugs and violence, then it was always more likely to happen at a Liverpool event due to the nature of the people they attract and the way they're taught to be 'real' Liverpool fans. The actual normal, nice people who follow them are powerless to change this though, it has to come from the club, the police and the media saying enough's enough.