Is Green The New Red?

Why is an environmentalist like a watermelon? Because a watermelon is green on the outside, red on the inside.

From The Times:

Where once they raged about the fleecing of the proletariat and quaked at the march of fascism, Blunt and his circle, transposed to today’s college bar, would rage about the fleecing of the planet and quake at its imminent destruction. If you squint, red and green look disarmingly similar.