The anti-prophet
Instead of being a servant of God like Mohammed the prophet, this Muslim man becomes immensely hateful and ignorant. If Mohammed represents divine clarity and oneness with the creator of life, than terrorism is the opposite, because Atiq and his associates are closed off to new information, and they pigeon-hole themselves in feelings of indulgent victimhood.
The anti-Muslim
Clearly Islam is a religious specifically suited to making citizens who can support their community during trying times. Islam mandates sacrifices in alms and service. It also mandates charity and sacrificial love. So, for these people to murder a girl in cold blood for sexual shame—that is using one verse to break the others. Instead of being a help to his community, he kills a disenfranchised woman without any attempt to try her for her crimes or to seek the men who also participated.
The actual death
Many people threw stones, but Atiq knows for sure that he hit her and killed her by splitting her skull open with a projectile. Atiq is violent and dangerous, because he is effective and legitimately powerful; that's what the reader learns from this detail. Atiq is the main character for this reason, because the reader is examining the logic of the murderer. The murder symbolizes Atiq's predicament, because he has judged another human life as if he were God, in the name of God, and technically no one knows what awaits mankind after death. Atiq seems to believe in hell.
The Taliban
The Taliban represents hateful agendas, which draw in angry and emotionally disenfranchised people. The congregation of violence is dangerous, because they can promote each other toward more extreme behavior than they would do alone. The effect of the Taliban is that, if not for all the other people throwing stones, Atiq's actions would be clearly murderous. The murderous community makes Atiq feel insulated from the consequences of his actions.
Cocaine
Although Atiq is so committed to sexual purity that he murders a prostitute in a fit of god-like anger and delusion, he also then turns around and sells cocaine, introducing chemical dependency into his own community. This is a symbol that he is not really committed to an ethical standard. In other words, the religious zeal was just a tool he used to earn permission to commit murder, but he has no real passion for his faith, or else he wouldn't allow his community to suffer by his own hand.
