ابوعمر الشيشاني قائد داعش في سوريا مسيحي ارثوذكسي

Commander of isis in Syria  born Orthodox Christian

Abu Omar al-Shishani is one of ISIS' most feared military commanders

 His real name is Tarkhan Batirashvili,
He was born to an Orthodox Christian father

 

http://www.dailymail.co.uk/news/article-2839307/Grinning-ISIS-commander-recruits-jihadis-Home-Counties-taunts-Britain-grave.html#ixzz49sEiQDWw

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Another Example 

Morten Storm Danish spy in Al qaeda

'Agent Storm': How a militant Islamist became a CIA spy

http://www.france24.com/en/20150228-interview-morten-storm-al-qaeda-cia-agent-terrorism-yemen-

aqap

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US and British intelligence agents in Al Qaeda and Isis
http://aljazeeraalarabiamodwana.blogspot.com/2015/12/us-and-british-intelligence-agents.html