I tend to agree, although there are some in the 2nd Ammendment Community, Tom Gresham being one of them, who I guarantee you would have said this guy was wrong NOT to shoot. Go figure.
He might say it, but I’m not sure he would do it. If he gets the drop on a knife-holder with a gun, and he is a safe enough distance to take his time and issue a warning, I think he’s going to issue that warning, unless the knife-wielder is actually in the midst of stabbing a victim.
It’s just good common sense.