I was reading articles about why , if you somehow managed to get dinosaur DNA to bring back dinosaurs, that it wouldn't be fair on the dinosaurs.
One reason is that our modern climate Is TOO DAMNED COLD for them. They likely wouldn't survive our colder climate
When the dinos were around, the earth was MUCH hotter than it is today.
Yes, they evolved during relatively slowly changing climatic conditions and so were able to adapt. Unlike animals today that will experience very rapid warming. Many forests won't spread fast enough for the animals that rely on them to survive. Coral reefs, with all of the animals that rely on them are fairly static as well, so they'll die out.
Agriculture mostly exists in relatively thin strips around the world. As the world warms these areas will become too warm for our crops to grow. Increasing carbon dioxide means they will also need to use more water for photosynthesis. Some areas, including in the USA and the Middle East, are already experiencing severe water shortages. So that will also damage our agricultural industry.
Why won't or can't people.just have to accept that the climate of the earth is in constant natural flux, always has been in constant flux, and always will be in constant flux?
Because the Holocene - the last 10,000 years, in which our civilisation arose - has had a remarkably stable climate. We have also never had to survive the temperatures the dinosaurs experienced. Humans can't survive when temperatures get much above 50°C, but there are areas that are already experiencing such temperatures.
Increased migration due to rising temperatures and increased conflict due to lack of water aren't good things and we don't have to accept them, because we have the ability to halt this catastrophic change.
Eventually thousands of years from now, we'll be in another ice age. That IS going to happen eventually.
Not if it's prevented by human caused warming.
The Milankovitch cycles, that lead to glaical periods, are currently in a cooling phase, which means global temperatures should be dropping, but they aren't. Why do you think that is?
Ice is receding in a way that it hasn't in previous inter-glacial periods, meaning we are about to exit the current Ice Age prematurely.