Old Carthusian
It's not WHAT they did but WHY that most professional aviators are interested in. You do know that's it's 2017 and in advanced countries it's the how the "holes in the cheese lined up" that is more important than blaming professionals.
Maybe they were negligent, maybe they were two god guys having a bad day (night!). I don't know so I won't speculate.
I am curious as to why they weren't flying an ILS at night. That's not a criticism as it may not have been an option. When I started flying to the USA I was told if offered a visual just say "no!".
BBK