"Surely you jest" would have been my first reaction, but then you are not known around these forums for your sense of humor.

Anyone intelligent enough (including you and the author himself) can see the premise of this piece (as is usually, with the left apologists)  -"It is all West's fault". 

"... In fact, the notion of Islamic unity is a very recent idea, one that was created mostly by Christian racists...." - when did the word Kafir, and its connotation as a whole,  enter the Islamic vernacular? 20th century? As a results of European racism?

"....Europeans invented the idea of "race" as a defining and restricting human identity. .." - see my original remarks regarding Mulsim's reference to blacks. 

"... postcolonial world of the 1990s" - What colonies lasted until the 1990s? 

The author is well traveled; no doubt knowledgeable on the subject. 
.
So knowledgeable in fact, that he steers clear off the inconvenient facts, while  manufacturing  white-guilt pieces.