The ending is flawed and makes no sense

Okay they were used as some type of biological weapon at end. But did the writer for once use his brain when writing this nonsensical ending? He seemed to have confused himself with traditional zombies which would have been effective biological weapons. I'm just trying to figure how he would think these ones would work. They aren't mindless drones. They essentially have the same feelings, thought processes\as a regular human. So they will react with primal robotic like urge as we see with zombies.


Okay so they want to infect people in Iran. What for? In fact one could argue that this would only strengthen them by making them that much harder to kill. So now they have a lust for blood? Okay well now they are consuming every unaffected being, that could potentially spread worldwide.