Those Vietnamese probably are Americans. But bless them for letting those more in need go first.
I'm not sure if they have citizenship yet or not but I think I remember Vietnamese fleeing the communists in a boatlift being relocated to Louisiana so they could fish.
They are sitting neatly in rows chatting with each other and waiting for everyone else to go first "so we don't get in the way."
Not only does it speak well of them it shows that being in America has great value and that they appreciate it even after a hurricane. It's a shame some of our native sons don't have that same appreciation.