Iran Frees Killers Because the Victims acted un-Islamic

Iran has freed killers because the people they murdered were conducting un-Islamic activities. The killers argued that they were allowed to kill immoral people according to Islamic teachings.

Please, someone explain to me how you are supposed to appease people that believe they have the right to kill innocent people they believe are immoral. You can’t reason with the unreasonable. This is the mindset of the people we have to deal with.