Climate change, a question?

The coming and goings of ice ages are triggered by Milankovitch Cycles. These are the cycles of the earth's tilt and orbit. These natural climate changes are also very slow, imperceptible in the course of one human lifetime. As the earth began to warm out of the last ice age, the northern hemisphere did not even start to thaw for 2500 years. After that, natural long-term warming increased and peaked 6,000 years ago. The earth would naturally cool to another ice age in 20,000+ years -- that's how slow it happens. We are not seeing perceptible changes just within the past 30 years. What is happening now is profoundly different that past natural changes.