I'm Dutch. I trained at Eelde. Not at the KLM school. These KLM trainees hardly ever acknowledged other trainees, didn't bother to greet and once they wore their uniform became outright arrogant. Not all, but certainly 9 out of 10.
About the incident. I can't understand this. Making such a failure at your base under good conditions. It's not rocket science to distinguish a taxiway from the runway. Unless they avoided a catastrophy, they should be fired. A captain at KLM flying 737 has more than 10 years experience flying from Schiphol.
The VNV's initial reaction is wrong. But they're just covering their colleauges a**es.