Having read all of the posts so far ... sounds like the holes on a very large Swiss cheese almost all lined up together.
1. Parallel runway lights switched off, giving impression that taxiway is the parallel runway.
2. Visual approach for noise abatement with no auto tuning of the ILS
3. Pilots at low point of circadian rhythm and fatigued
Far from being a long way away from disaster, this look to be very close ....