Transformers

Alien robots from another planet try to destroy each other in civil war that eventually travels to Earth. Optimus Prime and the Autobots are the "good guys" that have come to defend earth and protect human-kind from Megatron and his Decepticons. It was almost as if our planet was helpless to defend itself against this advanced extra-terrestrial threat. A device, the All-spark, gives either the Autobots or the Decepticons becomes the object of destruction that lead the aliens to our planet. The similarity here in our current world would be to that of a country trying to develop a nuclear arsenal, no one wants them to have it. Like the majority of countries in the world, the Autobots would rather have this weapon destroyed, than to have it fall into the hands of evil. The fight drags in the secret government organizations and other branches of military to help aid the Autobots destroy the all-spark. The all-spark is placed into the custody of a human who is trusted and had befriended the aliens. Optimus Prime tells the human if all else fails, to place the all-spark in his chest to destroy it, however it would destroy himself as well. After a brutal and highly destructive battle, the all-spark is destroyed when a human risks his own life and places the the all-spark in Megatron and destroys both. It shows while technology and power are quite dangerous, nothing can replace the heroism and emotion that exists in humanity. The Autobots, who owe their lives to a human, don't leave the earth to be destroyed if more Decepticons come, they choose to stay and protect. It can be likened to how the United States is currently trying to help stabilize the Iraqi state. It may not have been our war, but we are there now and we appear not to to be backing out until safety and peace is completely achieved in Iraq. The Autobots didn't have to come to earth, but they did and without their help help I doubt the humans would have been able to defeat the Decepticons.