I think people might be missing the main theme of this film
Most comments and reviews I have read about this film have spoken about the theme of morality, about how far a person is willing to go and still feel ok with themselves or about how the movie should have ended.
However, I think the main theme that Allen was commenting on was hypocrisy. Whether or not you agree with what Abe did, at least his actions were in line with his feelings and beliefs after hearing the conversation. However, Jill had the exact same feelings about wanting the judge to die, and when she found out he was dead, she even went so far as to celebrate it. But then when faced with the fact that Abe had caused the death, she suddenly changed her views and judged Abe, despite her original desire and relief for the judge to die. I think this is what Allen is making a comment on with the movie.
It is about the hypocrisy of people to think and want one way, but when it comes to their actions, act a completely different way.