The climate has always changed. There is a consensus on that. No one challenges that.
But, the left tries to trap people into denying "it" by equating "Climate Change" with "Urgently Harmful, Anthropogenic Global Warming." You use the former term to refer to the latter concept. Then when someone tries to deny the latter concept using your term for it, you retreat to the more generally accepted meaning of CC, and try to ridicule your debate opponent by pretending that their policy disagreement with you is really a disagreement with science, which it is not. You (the Left) switch definitions when it suits you, and that is disingenuous, and shows that you really do not want to have an honest discussion on the issues; you just want to shut down debate from people who don't want to increase the national debt with nothing to show for it.
As for me, my disagreement regards how harmful and how urgent it is. After all, Global Warming has occurred, and there is no doubt that it has been the single greatest natural event that has happened to humanity. It allowed civilization to develop. Chicago would be under a mile of ice without it. Mankind would have never left Africa to dominate the world. The oceans have been rising for 18,000 years, long before the first internal combustion engine was built. Alaska used to be united with Siberia by a 1000 mile wide continent-sized "bridge." England and Ireland used to be a part of the mainland of Europe. People lived in caves 160 meters below sea level near the coast of Spain. The question for me isn't whether we can stop it...I don't think we can. (And, we are near a natural peak anyway; and global cooling is a far greater threat to humanity.) It is too costly to stop it, and we won't be able to get countries like China and India to do it, and unilateral action by the US will only harm Americans for no reason since it will not achieve the stated goal. Therefore, it is better to adapt. And, humans are good at adapting.
Either way, I know this: Global Warming cannot be successfully managed by putting the last great free country into existential threatening debt by spending like a drunken sailor to line the pockets of Democrat donors with government handouts. If the Left took this threat seriously, they would be calling for austerity on non-CC projects, but they don't. So, that tells us that it is just an excuse to justify more government spending.