This is a case of you failing to communicate though. Not bad faith actors or whatever.
It makes perfect sense.
“It’s literally rocks…” Whats just rocks? Stonehenge!
“You’re valuing human life less than rocks, I think that says more about you than them.”
What are the protestors protesting for? Climate change.
Ie. If vandalizing Stonehenge is a bigger issue to you than climate change then you’re valuing human life less than rocks.
It could not be any more clear and I think that’s pretty evident based on the lack of offering a better wording.
It sounded like you are comparing the stonehenge protest to the one with the planes, not with climate change. Safety is critical in aviation, so it might sound dangerous to people that the planes were painted. I would instead say something like “they are valuing literal rocks over the lives of people claimed by climate disasters”. Then it’s clear you are talking about climate change in the second instance, and not the people flying the plane.