"societies lash out against outsiders/immigrants." It's not as one-sided as that. Many of the immigrants in the book are essentially 'terrorists', there was a

"societies lash out against outsiders/immigrants." It's not as one-sided as that. Many of the immigrants in the book are essentially 'terrorists', there was a funeral march by a group that is essentially Hamas in the film. Hamas are point-blank terrorists, though they are also a political group. A 'world on fire' with millions of people flooding into the 'small, stable area' definitely represent a threat to that stability at least on some level. It's more nuanced take. Almost everyone is a good guy / bad guy, and there is a lot of violence ... in that state, it's hard to have an easy moral compass.