The specific quote is "spending trillions on toxic, unrecyclable equipment while blowing up society." What has he supported for the last 20+ years if not that? Did he think his compute ran on unicorn farts?

Clearly he knows, since he self-replies "I apologize to the world at large for my inadvertent, naive if minor role in enabling this assault."

Just because someone does awesome stuff, like Rob Pike has, doesn't mean that their blind spots aren't notable. You can give him a pass and the root comment sure wishes everyone would, but in doing so you put yourself in the position of the sycophant letting the emperor strut around with no clothes.