Upon reflection, you are spot on.
She was sincere and comfortable in her own skin, Shep was more like a cub reporter filled with self-importance and assuming unto himself the ability to divine military strategy, geo-political dynamics, the Israeli determination not be be exterminated, and I'm sure, when he can get something damn cold to drink.
Poseur Shep.
And as far as being 'oblivious' to the muzzle of a gun near your head....
She is apparently quite a professional, and knows that the Israeli Tankers are pros too....
"Back in the day" I remember not cringing a bit when our heavy weapon's guys were firing close support a foot over my head.
Jennifer appears to be a gal after my own heart... I like the cool, collected ones.