I feel a large part of this is the frustration with all the tourists just randomly wandering on the bike lanes without a care in the world.
It doesn't justify the behaviour, but it does explain it a little bit.
And it is often not the Dutch people. Half the people in Amsterdam is tourists.
Dutch cyclists are substantially more likely to be running red lights without looking, at speed. They are more likely to be using their phone - meandering all over the path - or at night without lights. Stopping or turning without signalling - without checking over their shoulder - or pulling onto a cycle path without looking. There's also just as much nuisance cycling from groups of students two or three bikes wide having a social event during rush hour as there is from tourists wobbling around trying to figure out where they are going.
This is a familiar pattern: exactly the same as car drivers, people think being experienced means you can get away with being lazy and/or selfish. Then just blame "those other people" for the problems.
It's a minority, but I regularly encounter cyclists who clearly want to die. The most blatant example was a mother who was trying to direct her children to ride against the direction of traffic between a bike lane and two car lanes that just came from the A10 (presumably because she had to take the next road left and didn't want to cross the busy street twice).
Turning without signalling is a bit of an annoyance though, I run into that fairly often.
Kids cycling two by two is also frustrating because you can't overtake, but it isn't directly dangerous.
The fact that cyclists here in NL can break the rules with impunity and still stay pretty safe is probably a consequence of how good our infrastructure is, imo