The New York Times Magazine carries an interview with Andreas Malm, the author of the 2021 book "How To Blow Up a Pipeline." From the interview:
We live in representative democracies where certain liberties are respected. We vote for the policies and the people we want to represent us. And if we don't get the things we want, it doesn't give us license to then say, "We're now engaging in destructive behavior." Right? Either we're against political violence or not. We can't say we're for it when it's something we care about and against it when it's something we think is wrong. Of course we can. Why not?....
But I'm specifically thinking about our liberal democracy, however debased it may be. How do you rationalize advocacy for violence within what are supposed to be the ideals of our system? Imagine you have a Trump victory in the next election — doesn't seem unimaginable — and you get a climate denialist back in charge of the White House and he rolls back whatever good things President Biden has done. What should the climate movement do then? Should it accept this as the outcome of a democratic election and protest in the mildest of forms? Or should it radicalize and consider something like property destruction? I admit that this is a difficult question, but I imagine that a measured response to it would need to take into account how democracy works in a country like the United States and whether allowing fossil-fuel companies to wreck the planet because they profit from it can count as a form of democracy and should therefore be respected.