Where is your evidence that Brennan is Muslim?
I think he was stationed in Saudis Arabia twice. Being in Saudi Arabia does not equate to being a Muslim. If that was so then a lot of service men & oil workers would be automatic Muslims too!
All due respect, but have you been living under a rock for the past 8 years?!!
Brennan himself has said he is a convert and is now Muslim. Google is your friend!