To add to this: it is incredibly difficult to risk yourself and your family to protect strangers, no matter what the numbers are. That's why the act of defying

To add to this: it is incredibly difficult to risk yourself and your family to protect strangers, no matter what the numbers are. That's why the act of defying the Nazis in WW2 was particularly heroic: the alternative was to just go along, and be safe and comfortable. Heroism in warfare counts for less, since the alternative is often just a different kind of death.