If you watched the behind the scenes video, it’s quite obvious it was staged.Why do protestors and police have to be mad or violent with each other? A peaceful protest can end with peaceful arrest, with a moment for photo with someone famous.
I don't agree with all the crazy ideas to "save the planet", but I still think its a good idea to try not to wreck the place in a century or two, so I do agree with Greta on that point...
She was released the same day after her “identification process” was complete. Whatever that means. There were other protestors there and I have not heard of anyone else being arrested. The police went straight to her.