Germany: Police arrested more than 100 people who protested against the lockdown
reuters.com
reuters.com
Dissolving this protest feels actually warranted, in my opinion.
[0] They need to be announced in advance to authorities though, so preparations like securing the course of the march against traffic or providing a police escort can be made.
In NL our authorities are also keen to stress 'the need' for a protest to be announced to the local authorities.
However, it is only common courtesy to do so : constitutionally, there is no such requirement.
The Basic Law for the Federal Republic of Germany (i.e. the 'constitution') says
Art[ikel] 8
(1) Alle Deutschen haben das Recht, sich ohne Anmeldung oder Erlaubnis friedlich und ohne Waffen zu versammeln. (2) Für Versammlungen unter freiem Himmel kann dieses Recht durch Gesetz oder auf Grund eines Gesetzes beschränkt werden.
Notice sentence (2) which says that gatherings outdoors can be restricted by law. This law is called Versammlungsgesetz [0] here and, among other things, it states that all gatherings except spontaneous ones (i.e. without any advance organization) have to be announced 48 hours in advance at the latest.
From what I can tell, such a relativization also exists in the Dutch constitution [1]. I do not think that I could look up the actual law specifying the details in a reasonable timeframe, though.
[0] https://de.wikipedia.org/wiki/Versammlungsgesetz_(Deutschlan...
[1] https://nl.wikisource.org/wiki/Nederlandse_grondwet/Hoofdstu... - "Artikel 9: Het recht tot vergadering en betoging wordt erkend, behoudens ieders verantwoordelijkheid volgens de wet. De wet kan regels stellen ter bescherming van de gezondheid, in het belang van het verkeer en ter bestrijding of voorkoming van wanordelijkheden."
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Edit: This, maybe? https://www.parlementairemonitor.nl/9353000/1/j9vvij5epmj1ey...
I can't speak for the German case, but I am sure about the Dutch one. However, if your demonstration is a threat to the public order ( health, traffic etc ) you are (criminally) responsible.
But this is always the case, demonstration or no demonstration.
So I will repeat, in NL there is no requirement to register your protest with the authorities.
https://www.invidio.us/watch?v=AkE7Ju0cK5Y
Just imagine that the 100 people were Nazis.