Correct, there has always been climate change ... most of the change in the past happened over a millennia ... and some of it was catastrophic with changes happening over short periods of time and it usually meant the death of millions of life forms

The current climate change period we are living in is human made most definitely .... if our descendents survive, (or whatever new species takes over ... or even if artificial intelligence takes over) tens of thousands or millions of years from now - when they look back at the geologic record, they'll wonder why there was a weird global distribution of radiation and toxic material everywhere and they will notice the fact that a large percentage of species everywhere died off at around the same time we started to develop into the technological / communications age

Climate change has happened in the past ... what most people that say this leave out is the fact that it tends to kill off many creatures that can't adjust to the changes ... and if the changes are dramatic enough, it tends to cause a mass die off of creatures on the planet ... and what many of these proponents tend to conveniently leave out is that WE may be one of those species that will die out because we won't be able to survive these changes. We're technologically smart and we are creative ... but this isn't Hollywood, we won't pull off a last minute super hero, Hail Mary, super smart group of people get to save the day at the last possible moment ... if things fall apart, it will happen slowly over decades until we all fall apart, society fails and we all just slowly fade away because there is nothing liveable left to save ourselves.