[dayman]

In my own perspective, I'm only concerned about 3 people. My wife, and my sons.
If they're not in immediate danger we're finding an exit.

As Pax pointed out, we don't know what would have happened if he'd gone the other way, but it seems likely he would have lived. After all, everyone else in that Wal-Mart did.

I'm not a LEO, and it's not my job to put my life on the line for strangers.
It may sound heartless, but me making it home to my kids is more important to me than someone else making it home to theirs.
I'll leave engaging crazed gunmen up to those that are paid and trained to do it.

I didn't get my CHL because I wanted to be a hero, a vigilante, or a "sheep dog". I got it so that - if I need to - I'll be better prepared to protect my own family. That's it.