Actually, from what I remember, holocaust deniers tend to make up stuff out of whole cloth, both for their arguments and against (for easier demolishing, see). Maybe they look at actual evidence now, but I haven't paid attention in years.
In any case, I really have no idea whether the data in question was critical to the argument that climate is warming faster than it was earlier (since pretty much everyone accepts that significant global warming has been going on since at least the 1700s; the arguments are in the causes and details), but I just object to the hammering of the "deny", "denial", "denier" refrain.
In any case, I really have no idea whether the data in question was critical to the argument that climate is warming faster than it was earlier (since pretty much everyone accepts that significant global warming has been going on since at least the 1700s; the arguments are in the causes and details), but I just object to the hammering of the "deny", "denial", "denier" refrain.