On one hand, we have thousands of scientists building a coherent model based on lots of data. All of this is testable. Other scientists have done lots of tests to find flaws in the model, and haven't found any.
On the other side we have handwaving and gut feelings, powered and financed by people who don't want to pay for the damage they're causing. If you want to change the direction we're going, you have to build a coherent model based on lots of data, and convince scientists their current model is wrong. In science, this happens all the time: Newton's theory of gravity was replaced by Einstein's superior model, for instance. The scientific method is based on trying to prove everybody's models and theories wrong. But to do that, you have to provide data, and a model that fits that data.
People who deny climate science (just like people who deny that smoking causes cancer) don't do that. They handwave and bluster, but they provide neither data nor models that fit their narrative. You can't treat these sides as equals because they aren't.