There are a few real scientists who realize there is too little actual data on a geologic scale to do anything more than paint pretty but meaningless graphs.
The majority consensus among climate scientists is that's is getting warmer due to human emissions and the error bars on "how much warmer" are not big enough to justify continuing business as usual. But even if you believe that we don't have the data for accurate predictions, that is not an excuse not to be concerned. Quite on the contrary, it could be much worse than what the IPCC reports.