He offered the people on his hit list no mercy but it was a rather detached exercise for them save for the revenge hit on the woman. The aftermath of it was that he had no regrets about what he did only that he didn't see how it had really changed anything. It needed to be done no doubt but the lesson was that terror remained as something that simple vengeance wouldn't cure.
Good assessment.
Good comments and spot on. Personally, I thoroughly enjoyed the film and from what I could see others did as well. Several groups of people were still in the auditorium discussing what they had seen afterwards even after the credits had finished and the lights had come on.