Deniers of manmade global warming can join the same team
The main problem with the subject of climate change and global warming is that the earth is too complex to draw conclusions. But we do know that we are experiencing extremes on many parts of the planet. You could say that the extremes are happening more frequent but that the trend "is" the frequency of extremes not necessarily hotter or cooler.
What about the oceans? Acidification due to CO2 absorption? Death of life and disappearing species in the oceans and above? What about the air we breathe containing pollution from burning coal? What about the ice mass of the poles disappearing and increasing sea level?
Well these all contribute to what we can both agree on and that is the quality of life.
That is the team we are both on. If we focus on ways to improve the quality of life then we might actually prevent more weather extremes. But in the end it does not need to define a theory about climate change. It is the more immediate results like survival of seafood, maintaining ozone so that we can handle exposure to the sun. Preventing the droughts, the floods, the melting ice are all things we can start doing locally by fixing our local energy etc. The US has over 4000 coal plants. Does your state have any? Teach yourself about nuclear energy because it is a truly emission free source of energy. The quickest and cleanest way to turn around the effects of green house gas is to replace the coal plants with nuclear. Also to replace gas vehicles with electric vehicles is more sensible when the electricity needed for charging the batteries is not a contributor to green house gases or continued use of coal burning as an energy source.