The "family first, others second" interpretation is, I think, even more problematic when shit hits the fan. In disasters, it never benefits a community to turn on itself. And in fact, I believe the natural human reaction to disaster is to become more altruistic rather than less; see "A Paradise Built in Hell" by Rebecca Solnit for more on this.

The actually noble interpretation of "family first" is "family first, my own priorities second," at least so long as it doesn't lead to unhealthy self-sacrifice.