I’m generally supportive of any and all forms of non-violent protest (by which I mean not harming human life), including these, but let’s not pretend the choice is between “standing around with placards” and “vandalise random artwork & monuments”. Blockading ports exporting coal is an excellent direct protest, or vandalising actual fossil fuel companies’ property in such a way that disrupts their ability to do business. Heck, even the classic “block roads in peak hour” is better than this (just for the love of the gods, don’t disrupt passenger trains or busways).

Don’t get me wrong, this is still ok, and it’s better than nothing at all, but there are more effective ways to protest.