There’s no doubt there are, and I have several match going Liverpool mates who are decent people, but they unquestionably as a fan base are far less disposed to calling out wrong uns in their midst than other clubs. There are several cultural reasons for this. For example: ingrained habit of not grassing under any circumstances; out of towners frequently being intimidated by scouse fans, especially at away games; absence of criticism for reprehensible behaviour in the press.
All these things mean Liverpool fans are less self policed than any other group of supporters. I’m certain that if a City, United or Arsenal threw a bag of coins at opposition fans during a game, from the away end, that seriously injured a teenage girl in the home end, someone among them would identify and report them. No way is every **** in the away end not seeing that. Again and again we see this type of behaviour with no consequences whatsoever for the perpetrators, and the biggest factor in that is the fear amongst decent supporters of doing something about it.
Are you suggesting that culture is just as bad at other clubs?