I dont know, the strongest piece of evidence of climate change imo, isnt the ice cores, it isnt the geological formations left over from even the last major change which would have been when the glaciers started to melt and break up over north america.

Its sediment cores. They have been doing this since the 1800's, which funny enough, reoccurring cataclysm theory was a popular thing back then, around the beginning of the 1900's seems to be taken out of the history books.

If our leaders knew the end of an epoch was coming. Do you think they would tell the masses?

Im fairly confident they would let us plebs work and slave up to the very last day we couldnt.

https://en.wikipedia.org/wiki/File:PS1920-1_0-750_sediment-core_hg.jpg

What are some theories on this? All faked maybe?

https://en.wikipedia.org/wiki/Marine_isotope_stages

Marine isotope stages (MIS), marine oxygen-isotope stages, or oxygen isotope stages (OIS), are alternating warm and cool periods in the Earth's paleoclimate, deduced from oxygen isotope data derived from deep sea core samples. Working backwards from the present, which is MIS 1 in the scale, stages with even numbers have high levels of oxygen-18 and represent cold glacial periods, while the odd-numbered stages are lows in the oxygen-18 figures, representing warm interglacial intervals. The data are derived from pollen and foraminifera (plankton) remains in drilled marine sediment cores, sapropels, and other data that reflect historic climate; these are called proxies.