That's for some of the responses...
The article also neglects that since th assault was not conventional, non-combat units suffered causalties at a greater rate than usual, since the supply lines were left unguarded. The actual answer to this question is not with in the scope of that article...the causualties have been publicly annouced...one could make a tally of ethnicity, and probably economic background. From the stories i've read in the local paper here, and nationally, i don't recall a preponderance of middle class caucasions being the ones to die...