All humans are doing is possibly speeding up an effect which was already happening
I agree with you anon, 100%. And I say this as an illustrator who's done work for a geologist for the last 7 years principally on the last Ice Age 20,000 years ago. I've seen a lot of ice-data stuff. - The geologist I mention is surprisingly skeptical too!
Humans are indeed accelerating the change.
What needs to get into the MSM is the idea of what geologists call a 'tipping point'.