The Mauritshuis is a beautiful museum, unfortunate...

The Mauritshuis is a beautiful museum, unfortunately our visit ended on Monday 10 June 2019 in a very bitter disappointment.
At 5.45 pm the security staff drove all guests to the main exit like a herd with the announcement that we had to leave the building as quickly as possible. At that moment it was raining hard, a kind of cloudburst. The rain radar indicated that the shower would be over at 18.13, but the security was inexorable: "rules were rules". Everyone asked if we could take shelter from the stairs that would take us outside (it was now 17.55), but the security became increasingly unpleasant. I was called a middle finger from one of the guards, they made obscene gestures and my Australian girlfriend was called kakmadam. Too bad for words. I asked for the name of the security guard, but he didn't want to give it and I got a headache again. Eventually we were driven up the stairs and laughed at by the security guards, we were sent to the tunnel at the Binnenhof, where we waited, shivering and completely wet, until the rain stopped (indeed at 6.15 !!!). The only thing we asked all this time was if we could hide for another 10 minutes. And then you get such a treatment. A museum unworthy.
At the Brasserie (which also closed at 6pm) the people were allowed to hide until 6.15 pm.
I am a resident of The Hague and a regular visitor to various museums, in possession of a museum annual pass