Sorry Luna bit this is wrong. At least where I live in Germany.
These demos are obviously organized by the government against the political opposition. There is no doubt.
Example from my town: in school teachers tell the kids when to meet where and what to write on signs.
Same for two local sport-clubs. Football and basketball. Kids there are animated to go demonstrate against the opposition and people active in the local governments (‚Ampel’) told the trainers how to animate them more and they gave exact guides what sentences on the signs should be used!
This is very much known from the Stasi already and it is highly illegal afaik.