The scientists that have been looking at this for decades and decades now HAVE considered natural climate variation as the potential cause BUT IT FAILS.
As, for the rest, your belief that you have refuted the greenhouse effect of CO2 with your astounding and utterly unique and incredibly insightful historical observations is, really, what's holding you back from a normal life. Set it aside. Obsess on something else. Women, for instance. Or men, if you prefer. Just stop repeating that pretentious claim as if it had any value to ANYONE else because it does not.