Read the book first, Israel and North Korean being the lone hold outs to the Zombies makes sense. Second, it's a summer blockbuster that came out of Hollywood. America is generally always the country to be depicted as awesome, in this case it's because we have Brad Pitt. But it's so prevalent no one cares or notices anymore. I think this is some nationalistic dust kicking when this is ultimately a movie about the survival of humanity.
German accused of joining ISIS in Syria deported by Turkey (AP)
from the article: What 'World War Z' says about Israel