he's similar to hossein nasr in his evil perennialist ideology of schuon and lings http://www.huffingtonpost.com/william-c-chittick-phd/islam-as-a-religion-of-lo_b_757352.html http://en.wikipedia.org/wiki/William_Chittick keller, a self-styled "mufakkir" on Shaykh Al-Akbar Ibn Al-Arabi, in his own diplomatic way, has "refuted" him too http://www.masud.co.uk/ISLAM/nuh/amat.htm ever the politician, keller does not make his stance on gunon, lings, schuon, chittick, nasr etc. crystal clear. furthermore, he wouldn't be caught dead "refuting" some of the mureeds of these devils, like tim winter, mark hanson, ali jifry, ghazi bin talal, o-mar bin hafeez etc. most of them openly approve lings for example, or like the shameless hanson sing praises of buddha in tune with perennialist philosophy. ghazi bin talal is an out and out open perennialist and considers people like hosein nasr as "specialists" in tasawwuf.