Crikey,
I'm astounded at the number of people trying to mitigate what a total cluster this was. Yes, I know that its fashionable in aviation not to point fingers and apportion blame. I also know that we need not throw stones, willy-nilly, for 'it could happen to you' when circumstances conspire to paint you into a corner.
However, this was not being painted into a corner. This was a two-engined go-around. A beautifully simple operation in a Boeing. It is akin to being unable to do other very basic manoeuvres, such as landings, steep turns, etc.
Absolute lunacy that leeway is given over creating such a mess over something so simple. I appreciate that external factors may be impinging his critical thinking abilities, but the captain must have been legally unfit for duty sometime before such effects impinged upon his abilities to perform a go-around, and cause an emergency situation, whilst damaging an aircraft.