The Gospel According to George Romero (Revision)

[dukealien]

Hunger brings us back.
Chewing is the way 
of the night flesh.
Worms teach us 
that the mouth
is not for words.
No one sleeps 
the long night.
When we eat your brains, 
we can remember
the sunrise and who
we were. Like you, 
we always want
to look back.

This is very effective - sympathy engendered by a thoughtful buildup.

Structurally, the first part (before "[W]hen we eat")  consists of short (staggering?) lines reminiscent of the zombie gait.  The second part is grammatically more complex, establishing the sympathetic connection with the reader.  Has the speaker just dined, to be able to assemble it?

Suggestions for improvement are few.   Using a simple rule of thumb (as, with zombies, "Fire works!"),  instances of "the" could be removed without loss of clarity (though they do help the first part shamble).  The only ones that have to remain are "No one sleeps/the long night" and Line 2, though substituting "our" or the like could eliminate one.

Placing "we were. Like you," on one line is well done.

The speaker of course mischaracterizes the (conventionally) living, who look forward.  This is our tragedy; perhaps that could be alluded to, though it's a complex thought for the speaker.  Their virus leaves the undead only the past (and not their own), if that, and their hunger.  Their tragedy is that they can't even thank us for burning them to ash.

Political metaphors come to mind, but are not called for.  ("Swamp Thing" would be more like it    .)

In short, it's moving and could be made slightly more so.  Good read!