a story of patriotism...

The making trouble only started after the police came.

No the making trouble began when he refused to follow the instructions of the official.

I think I understand the Dutch law a lot better than you. I see you come from Ireland, you may know all the Irish law by heart but this isn't Ireland and we Dutchmen have got other laws.

You demonstrate otherwise.
In fact you make it very easy.
So under the big set of laws you list can you detail the specific ones for which your father can be prosecuted?
Have a clue, the common term is trespass.
It means being somewhere you are not allowed to be ....like remaining in a council meeting after you have been told to behave or leave.
Disturbing the peace....that means the annoyance of others when you are not allowed to