Some people blamed it on the "Lavkarbo"-diet (low card, high fat) that was trending in Norway at the time.
https://www.google.com/trends/explore#q=lavkarbo
I switched to only using animal or cold-pressed fats a couple years ago... It's helped some aspects of my health a lot... though I still crave starchy carbs...
https://en.wikipedia.org/wiki/Margarine
Yeah, most "made do" with that. It was just a combo of diet fad, holiday "traditions", and media looking for anything "controversial" to talk about...