When you build and adjust computer models specifically to confirm your hypothesis, you will always succeed. In reality, they have absolutely no idea what ocean currents were doing 130,000 years ago at the peak of the last interglacial period, when global temps were about 10° F higher than now.
Einstein: But but, Zat is not Zience! Ver ist da experimentz?
Milankovich: Da! Komrade, dey forgets duh vibble vobbel off da orbitzelz round da Zohne.