Romm describes the retraction by the publishing journal because of plagiarism of the paper that grew out the congressional report that supposedly undermined (but in reality did not) a swath of paleoclimatology as well as the credibility of climate science as an area of research as something that "rocks cornerstone of climate denial."
I like methaphors and similes, but I strongly disagree with the notions that denial of climate science has a cornerstone or even that it amounts to a house of cards.
Climate science denial, where there is even an attempt to justify it, is generally marked by a mishmash of assorted and often contradictory ideas that do not actually fit together to paint a coherent, fully explanatory picture. A metaphor I have used is that of a casserole bound by "anything butter" where anything in isolation that has a whiff of suggesting for whatever reason that human-driven climate change is not a concern is thrown into the mix with little to no thought of how the ingredients fit together.
Calling climate science denial a "house of cards" or saying it has a foundation gives it way too much credit. Even a house of cards implies pieces intricately and carefully put together. John Cook expounded on a difference between a "skeptic" and a "denier".
Do you look at the full body of evidence, considering the whole picture as you build your understanding of climate? Or do you gravitate towards those select pieces of data that, out of context, give a contrarian impression, while denying the rest of the evidence?
Skepticism demands concern for consistency in the big picture. Denial chases any nugget that might dispute what is not wanted to be believed, like saying it not warming (despite the all the varied evidence of warming), then that it is warming but because of the sun (despite the lack of a trend in solar activity), then that it is because of an ocean cycle (despite the lack of a physical mechanism by which that could cause the observed warming), then that even if it is us we cannot change our ways to do anything about it.
A common other side of denial is the belief that tugging at any supposed loose thread in the whole of climate science unravels the whole thing. That is why there is all the rock-throwing attempting to punch holes - the belief that the science is a house of cards that can be toppled by anything. Thus there is so much of anything being thrown out trying to do that. The goal in attacking the science is to justify preconceived notions, not to satisfy curiosity or build our understanding.