Have you ever wondered that amongst all of the living dead there was one who died for our sins? Apart the fact that zombies are mocking the concept of the great redemption -which was a main influence for centuries in the civilization-,
could they have a symbolic meaning?
What if zombies are just sleepers in the matrix or hypnotised by the obey posters all around town?
What if behind the gore they represent the people who want to bring you down whenever you try to look further?
"You are lost... unless you can make them behave."