I mean, I get that the "forming a terrorist group" charge is probably excessive, but you're only going to make people hate you (and by extension, your cause) by blocking highways. People literally need those, particularly ambulances and other emergency services.
Blocking airport runways and vandalizing priceless pieces of history will also make people hate you. Just Stop Oil is Big Oil's dream activist group.
What else? You could always try educating people about the relevant facts and convincing them that your proposed solutions are the best way forward. This meme would work just as well if you changed the caption on the right to say 'Climate activists blocking roads and getting into fights with paintings'.