1) Homo sapiens appeared 200,000 years ago. More than a million years after the peak you think relevant. It is not.
2) Your peak took roughly 14,000 years to develop. Yet you claim such things have happened in decades as part of normal glaciation cycles.
2) Your plot is of isotopes of hydrogen and oxygen. You do not have CO2 there and you do not show the rise of the last 150 years.
3) "CO2 is not necessarily responsible for the minuscule [sic] rise in temperature". I really hope you can see the logical flaws you've committed here.
There have been terrestrial climates in Earth's past that humans would not survive. But they took place on this planet. You (and others) seem to argue that we should not be concerned about the return of such conditions. Such a position is obviously wrong.
Your "not necessarily responsible" comment is asinine. It is close relative to the comment that the Earth went billions of years during which it suffered millions of forest fires, none of which were caused by humans. Therefore, humans don't start forest fires.
So, contemporary heating is taking place orders of magnitude more quickly that heating during glacial cycles and anthropogenic CO2 is quite certainly the primary cause. You have yet to produce a single argument that casts the slightest doubt on that contention.