Demons dance in a blood-red sky

[zahrakh]

Demons dance in a blood-red sky
above the corpses where they lie,
above the lies for which they fell;
tears on Earth, delight in Hell. (Although it has rhythm, the last line feels bit odd, tears on Earth, delight in hell?)

Like Dover Beach and Flanders' fields
the ground a grisly harvest yields
of noxious weeds and mangled shoots,
toxic dreams and caustic fruits.
(Very nice, this one was powerful)

Abel walks among the stars
but it is Cain who bears the scars.
Now I understand what Ecclesiastes said, (this line should be edited I think , Now I understand what... it is bit disturbing the flow)
pity the living, not the dead.(very well done)

Where are these demons who nimbly prance
in danse macabre with quill and lance?
Dear God, dear God, they're coming nearer! (You could use only one Dear God, I think it'll do)
There! There! In the mirror!

Demons dance in a blood-red sky
above the corpses where they lie.

I like this poem, the ominous, dark feeling to it very nicely presented.
I couldn't see much to change or critique.