I think I do owe Zizek an apology for misrepresenting him in my blog. He doesn't discount ecological crisis in the essay that I linked to. He sees it as potentially catastrophic, while at the same time maintaining that humans cannot contemplate their own death in real terms. While I'm not sure I agree, this is not the egregious claim that I said it was. What Zizek sees as the "ideology" of ecology is, instead, the ways in which corporations can jump on the ecological bandwagon to improve their image and in which ecology can serve as a placeholder for all sorts of non-actions. But if this is the case, I have a serious problem with Zizek claiming that ecology is the new ideology. That claim seems to be more of Zizek's trademark hyperbole: ecology will be the new ideology until Zizek--like a cranky geriatric--finds some new phenomenon about which he can excoriate the world.
I have a lot of problems with Zizek. I think he severely misrepresents ecology, for one. But his argument that ecology is the new ideology is not also an argument that ecological crises don't exist, which is basically what I accused him of saying.
I'm not going to erase my critique either, because I do think that some on the left use the critique of ecology as ideology as an excuse to dismiss ecology.