Busting minima should not be taken lightly and will be properly investigated. However this crew did not autoland in nil visibility, they self reported going below an MDA of probably between 500 and 600 feet on a non precision approach, with a reported cloud base of broken 800 in light rain showers and visibility reducing to 3000 meters.
In this situation in a jet you can break out with ground contact but not be able to see the runway because of the forward visibility. On an ILS with minimums of 200 feet you would probably see the runway at 400 feet and it would be a normal day at the office. The F100 is pretty well equipped, half way to an Airbus, said friends of mine more familiar with it. We will find out eventually what happened and why. But so far it sounds a bit less dramatic then some are making out.
I think one learning point may well be that marginal conditions can make decision making more difficult. If the reported weather had been clearly insufficient the decision would have been easy. Or to use Professor Handy´s analogy ˋthrow a frog in boiling water he will jump out, warm the water slowly and he will boil to death.´