I was just having trouble understanding what the sentence was referencing. Once I tossed a comma in, I was able to understand that you were referencing the original Abu Gharaib event. The use of ‘that is’ without a comma to create a pause (which would be present if it were spoken) was confusing to me, because it seemed like there was something you were intending to reference in the sentence that I didn’t see. My brain read it and went “this that is… what?”, as in “What is this that?”