If Apostle Peter can do it...
I've already answered this...
The guy may be off the hook on a technicality--the terrorist asked if the Jordanian was a "Christian," he didn't ask if he believed in Jesus Christ. "Christian" can have all sorts of connotaions & baggage which does not even involve professing to believe in Jesus. Christian in that part of the world may be more of a cultural & a western concept.
Not my call, but the scripture does say if you "deny me before men..."