His films make the majority of their money in the US. The majority of US residents asked - if the media is to be believed - seem to think that the released man should either be killed or at least stay in prison. Saying what he said isn't exactly flying in the face of public opinion. If anything, it could be viewed as jumping on a bandwagon.Yeah, but brave because it could have ended his career! Public opinion, when you're a movie star...
Not that there is any reason at all to believe that Mr Sandler doesn't really think that way, but it would have been far braver - from a career-ruining perspective - to have publicly said that the man's conviction was questionable and he wished him no ill.