That's not really the problem. The problem is that one side is claiming there's no data or no agreement, when the objective fact is that there is TONS of data and TONS of agreement.
The side that is on the side of science is tired of having last decades debates over and over and over again because the side against the side of science is just pushing an agenda (protecting the status quo).
Legitimate: Questioning and verifying the science, making sure results are duplicated, etc.
Legitimate: Questinging what policies or procedures should result from the scientific finding (aka "what do do about it" if anything)
Illegitimate: Smearing valid scientific results through ignorant half-understanding or misperceptions, simply because you're a paid lacky of an organization that feels "threatened" by the findings and is scared of what possible formt he solutions might take.
Recently one of the biggest climate-change skeptics, backed with massive funding from climate change denialsts with a huge investment in the status quo and a huge political agenda to push (aka The Koch Brothers) went over all the existing data, brought in new data, and put the entire thing through the scientific wringer (everything from the hockeystick graph, to "heat-island" theories, to solar influence, etc)... and this Climate Change Skeptic came out of it a convert, admitting that Climate Change is REAL.
We need to move beyond constantly questioning whether it's real or not, and get to the "okay, given the scientific findings in this area, what if anything should we do about it, and what are the consequences, pros-and-cons, of any given course of action, including complete inaction?"
There is a legitimate debate to be had there.
But to continue to question whether climate change is "real" is like those continuing to question whether "evolution" is real. Sure, some details almost certainly have yet to be discovered. But you know what? That's science.
Newtonion physics wasn't WRONG. Ensteinian/Relativistic theory just expands what was there and fleshes it out. It didn't throw it in the garbage. For many real-world approximations, Newtonian physics works just fine. For others, Relativity must be taken into account.
Similarly, I'm sure we'll continue to discover more and more about evolution and about climate change and humanity's influence on it. But it's not, at this point, going to completely invalidate all that has come before.