It leaves the stigma that the entire village has been raped, so why doesn't the whole village seek justice for the rapist instead of punishing the victim?
Victim blame furthers the tendency for society to hold girls accountable for the actions of men, with no shame or reprisal against the man who raped her. There needs to be a loud message sent that it is not okay for this to happen. Rape is never ok, and in a society where women are silenced anyway, this further leads to shame and silence with no support or justice for the victim.
"The International Criminal Court says it believes Col Gaddafi's forces are using rape as a weapon of war. The ICC says it has reason to believe orders to rape were given, and the drug Viagra was distributed to fighters. ... "The order to rape was not given to the regular army," says the major, who did not want his name to be used, because his family is still in Tripoli. "Col Gaddafi knew we would never accept it. It was given to the mercenaries." (BBC)