So what? Ice cores from Antarctica show that at the end of recent ice ages, the concentration of carbon dioxide in the atmosphere usually started to rise only after temperatures had begun to climb.
So you've identified a feedback loop. Milankovich cycles warm the Earth, which cause a release of CO2, which further warms the Earth. Now imaging what an Earth warming would be like that is _caused_ by increased CO2 emission, rather than just being fed back by it.
Did that increase previously occur over 250 years or over thousands/tens of thousands?
Curious. It's almost like the climate is a complex system that requires more than 2 variables to model.