I hate to say this, and please read to the end before you judge me.
Karlos has a point. Liverpool, both the city and the team had a reputation at the time of Hillsborough. Scouser jokes were doing the rounds, and all focused on scousers being poorly educated, theiving benefit cheats.
Football also had a bad reputation.
These things made it easy for the lies to fester. It made it easy for the police to discredit liverpool fans and for the rest of the country to say, "Look they've done it again".
I'm not normally one for conspirasy theories but at the time I did think, "I wonder if the coops thought it would be a laugh to have the Liverpool fans packed tight". I have no evidence for this, it's just a reflection of the way football fans (yes I know only a minority were hooligans) were viewed, somewhere worse than animals.
Remember this, at the time the government wanted football fans to carry ID cards, the law was drafted, ready to become law and was abandoned because the Taylor report said if it had been in force Hillsborough would have been worse.
The police covered up and covered up and discredited the dead, the survivors and the families of both. They had legal advice paid for by the taxpayer from day one. But they could only do this because of the political situation at the time and the reputation football had at the time.