It is fairly common knowledge that Carrey is a gun law advocate in the US, so taking a stance against strong onscreen violence is understandable as it is frequently held up as a potential cause for violent behaviour. However it is to the timing of his announcement that makes for the most interesting discussion. Carrey states in his first tweet that his change of heart was due to the tragic events that took place at Sandy Hook Elementary School in Newtown, CT, where 20 year old Adam Lanza killed 20 children and 6 adults, not including his own mother and himself, in one of the worst spates of gun crimes in recent years.
Kick-Ass 2, according to IMDB, was in production between September 7 to November 23 inclusive, while the Sandy Hook shooting occurred nearly one month later on December 14. The abhorrent nature of the crime is shocking, but Carrey's reasoning is puzzling. If we took the shooting out of the equation, Carrey must've been satisfied about the script in order to agree to appear in the film. So had he not seen the first film? Considering the violent nature of the previous film, including the unforgettable introduction to Chloe Grace Moretz's child vigilante Hit Girl, Carrey would have to be unbelievably naïve to think the sequel would be anything different. The comic's creator Mark Millar seems to agree with this in his response to Carrey's statement. On his website he states that the film, unlike most other modern action movies, "focuses instead on the
CONSEQUENCES of violence, whether it's the ramifications for friends and family, or, as we saw in the first movie, Kick-Ass spending six months in hospital after his first street altercation."
Since Carrey agreed to shoot the film, perhaps something has changed in the edit. As the cast and crew gear up for the upcoming press junket, the early cuts would be in. Has Carrey objected to the interpretation of gun violence in the finished article - something that was not in the original script? Could it be that the film has failed in Millar's intention to deal with the consequences and merely glorified the use of firearms and vigilante justice? Or has one of Hollywood's big stars simply detested the finished product and wishes to cut ties before the reviews come out? Only time will tell, but the screen violence debate is back once again in the public eye and Kick-Ass 2 may garner a lot more negative scrutiny upon its release - something studio bosses definitely do not want to hear.