From the heavy title, we know this isn't going to be a light read, Dieter. And the poem does tackle a seemingly very dark issue, complete with Pagan-style witch-burning imagery. The strongest idea of the poem is the personification of 'western decadence' which leaves the reader wondering to what extent this is personification or persecution of a real human being. Or both.
However, as it stands, I do feel the poem is slightly over-written. If you'll excuse me, I wonder if a trimmed-down version might be more effective, removing some of the moments where you 'tell' more directly...
western decadence, expunged
ashes on the ground
still smouldering
thin strands of smoke
rising like remorse
as though lighting a barbecue
on Saturday evening
they had kindled the fire
as if to make sure
it would be right for hot
dogs, cheese burgers, marsh mellows.
They had dragged him
from his granny’s house
faces shining with grim
passion in the blaze
what’s left behind:
smouldering ashes
the sane people can be sure
that things are whole again
and in his granny’s house
wig, false eyelashes, fake beard