You are introduced to these characters and come to know them intimately. As you follow their lives it becomes clear what led them along their path. You begin to understand their actions and reactions. You may cringe at some of the ugliness and violence, but you cannot look away. You will be sickened by the depravity, cruelty and the incident of bestiality. But at that point you will be so immersed that you will find yourself wanting revenge and cheering when it happens. And you will know, in the back of your mind, that although this is a work of fiction, much of it is closer to the truth than you might like.
And in the end, you realize that even bitter enemies have a common thread.