If anything it seems like this attack would undermine the arguments for gun control in the US. After all, NZ has much stricter gun laws than the US, and he was still able to do this. So it seems all this attack (and the one in Norway) demonstrates is that if someone is determined to attack innocents with a gun they're going to find a way to do it, laws be damned.

And yes, I understand that's not the way the media or the gun control advocates will spin it but that is the way that a lot of people "in the middle" (i.e. not committed strongly to either side of the gun debate) are likely to see it.