Question 1: Does climate change exist?
Answer: Obviously. From the standpoint of a geologist, and having examined sediments laid down in the last 600,000,000 or so years from boreholes it is evident that the climate changes, and has changed drastically at any given place on the planet, over time.
Question 2: Do humans have anything to do with that?
Answer 2: Well, according to accepted theory, we didn't have anything to do with the first 596,000,000 years or so of that time frame, and it is likely we have had little or no effect on the rest of it. It is a natural process, and one we may have recently witnessed, but as passengers/bystanders, not a driving force.
That isn't saying we can't make places particularly nasty or unhealthy for our own habitation by the production and accumulation of our own wastes and byproducts, but all in all, we don't change the climate, we just live amongst our own mess. That's more a matter of housekeeping than adjusting the thermostat.
Now, can we stop this ridiculous stupidity that is doing more damage to the place we live in that it will ever be able to do to change the temperature of the planet, and focus more on adapting to the natural changes we will be faced with in the future.