The cover was famously controversial because it depicted Mark Chapman; Rhino subsequently released a "clean" version.
They justified it at the time by saying it depicted the darker side of fandom. Which I think is a fair point.
Eerily, Woody Allen's film Stardust Memories
made a similar dark comedic point, and appeared in cinemas only a couple of months before Lennon's murder, released in September 1980. In the film, Allen's character is approached by a young fan who has been stalking him. The fan explains 'I love you Sandy - that's why I am going to have to kill you', and he takes out a handgun and fires repeatedly.
Personally I felt the LP cover was justified as a way of reminding us that not all fan worship is benevolent. But appearing within two years of Lennon's murder it was too soon.