Amazing game and amazing story. Playing as Abby and seeing the story from her point of view made me realize that, all though we all love joe, he has killed hundreds.
She and many others view him as a villain and sooner or later he would've met his demise at some ones hands. Abby did what any person would have done in her situation. She meets her fathers murderer by chance after many years and takes the opportunity to kill him. All Actions have consequences and Joel is not exempt from this rule.