Not a change at all.  Spewing radical rhetoric "eco nazi" is a poor substitute for civil dialogue.  MLK had a lot of experience receiving this sort of abuse, with grace.

I've read nearly everything he wrote and have profound respect for his vision and compassion.

Given what he said about US herbicide spraying of Vietnam I doubt he would be a supporter of converting these public lands to corporate ownership, which would "allow" them to be poisoned.

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MLK, April 4, 1967, excerpt:

"They watch as we poison their water, as we kill a million ares of their crops.  They must weep as the bulldozers roar through their area preparing to destroy the precious trees.  ... So far we may have killed a million of them -- mostly children. .... What do they think as we test out our latest weapons on them, just as the Germans tested out new medicine and new tortures in the concentration camps of Europe?"