Honestly, rule number one of hostage anything is "it sucks to be a hostage". If the bad guys really wanna kill 'em and aren't total morons they're gonna succeed. But as token mentioned if the ops plan was "okay, send steve in with a shield and we'll just hang around outside" the french don't have shit for tactics and steve has huge brass balls hidden by that shield.
What really happened is guy number 2 in the left stack and guy number one in the right stack decided maybe gunfights aren't for them right after rounds started popping off. Which is a pretty understandable reaction, unless you're steve.