In this case it seems that they are a far left group that has decided to squat a restaurant for good old 'class struggle' reasons and vowed not to back down...

It also seems that it is not any restaurant but one of the 'victims' of the 2015 terrorist attacks [1]

Basically political extremists trying to disguise themselves as environmental activists. Not interesting people, to say the least.

[1] https://www.tellerreport.com/news/2021-01-04-%0A---justice-o...