Thing is that 97% figure comes from a study done in 2011 the reviewed papers from as far back as the 90's to see which ones directly supported that human activity is warming the climate at a drastic rate. The other 3% did not refute climate change, but had inconclusive results, in other words what they studied could not conclude a full support of that theory.
But since 2010, the number of papers the directly support human driven climate change is above 99.9%.
Since this is such a heated debate, it gets a lot of funding ON BOTH SIDES (any time someone screams "follow the money, scientists are being paid to push climate change!" You can follow the money and find way more funding for anti-climate change). Thus there are literally hundreds of thousands of papers at this point that either directly study climate change itself, its effecta, what's causing it, etc. At this point it's more studied and conclusive/agreed upon than even gravity.
- - - Updated - - -
Go and read their research papers. They don't agree because of majority pressure. That 97% figure comes from analyzing their papers themselves, so they did personally question it, test it, and got their answer.
This isn't just group think, this is literally hundreds of thousands of experiments that are designed to question the theory for over half a century.