>All in the name of fighting climate change
This was a Gaza thing. The picture is of Lord Balfour. Now why would these people want to desecrate a painting of the just and righteous Lord Balfour?
https://www.timesofisrael.com/liveblog_entry/radical-pro-palestinian-activist-vandalizes-portrait-of-arthur-balfour-at-cambridge-university/
https://en.wikipedia.org/wiki/Balfour_Declaration