For more of Judt's take on how the Flanders/Wallonia split has played out, here is an out-take from Judt's acclaimed survey Postwar:

http://faroutliers.blogspot.com/2007/10/judt-on-belgian-iden...

Anyone at all interested in European history would enjoy his essays and this book. Deep and erudite, yet with an approachable narrative voice.