My take on the movie.. its awesome, here is why..
First i thought, yikes, what a cheap movie, B production for sure.. ,then i thought what zombie movie? really..than hmm,this is different..alot different..
then in the end, omg, this is masterpiece, classic.
What movie represents, the hive mentality, the next evolution of humanity is to merge into a hive like state(globalisation, standardisation, pop culture, pop everything), hooked to smartphones, selfies culture, selfishnes embraced in "i'm cool" thinking..
In the end he goes to destroy the evil yes? he blows it up, then we find out he is actually walking in the circle as others.. the meaning is dramatic if you really get it, he destroyed evil, protected his child, he won, he didn't let evil take him, he is .. a SLAVE.. to be slave is to think you are free, for that is the way one becomes a slave for ever.. and will protect their illusion no matter what.
All those "zombies" were ppl who succumbed to the hive mentality, in their mind they are as cusac saviours of their families, loved ones etc.. in their mind, in reality they did nothing of sorts, they are slaving in a circle according to frequencies that tells them in what circle to spin(coca-cola, internet, porn, self-gratification, etc)..
This movie is insanely good, and with A-production studio and money would become classic easy, but no studio would pick it as it criticizes the society in such a harsh manner and the hive idiots that actually compromise 99% of idiots who watch A-production blockbusters..