Climate Change Is Not A Big Deal

I believe climate change is not that big a deal because the earth has been having spikes in temperature for the last 400,000 years and the current spike in temperature is the lowest it has been through those years however I have realized that there is a relationship between co2 levels in the atmosphere and the earth's global temperature it has been happening throughout that time span and currently the co2 levels are the highest they have ever been that means the temperature should be the highest it has ever been so my argument is if the earth has handled higher temperatures I believe it can handle this one