What they don’t explain is how this organic material frozen in the permafrost got there in the first place. Obviously it was warm enough eons ago for the organic matter to be deposited there. In contrast, it was covered an ice sheet a mile thick not so long ago.
Bingo. It's interesting as a regional anomaly, if that's what it is, but it's a nothingburger compared to our overdue (and impeding) modern Ice Age.