I'm more than frustrated. These guys weren't defending their homes, they were blocking others' escape from a disaster. The choice wasnt between the town helping victims vs. the town lsoing everything - it was fear, not reality that closed the bridge.
Gunslinger's thoughts reflect the best things these guys could have been thinking, but I wonder if their actions were that jsutifiable -- and I suspect that stereotypes of "those folk across the bridge" played a bigger role than a man's right to defend his home. Nobody had supplies to care for those people, but the guardians of the bridge didnt want to even share an electical outlet...and some peopel in NO died from lack of power (oxygen concentrators, insulin preservation require power).
I mean, even IF there were some dangerous people wanting to get across the bridge the majority were jsut poor people, looking for safety.