One could be forgiven for thinking that climate groups had been masterfully infiltrated by swathes of fossil fuel merchants. How else are we to make sense of the recent spate of climate protests involving the vandalism of iconic artworks in galleries throughout the Western world? When your marketing strategy mirrors that of an ISIS fighter destroying thousand-year-old artefacts in Mosul’s central museum, you might want to rethink the way you’re going about your business.

While some may make the argument that throwing a can of Heinz soup on van Gogh’s Sunflowers in London or gluing one’s hands to a Picasso in Melbourne is...