Everything in nutrition will probably always be revisited. But I think the popularity of the idea that saturated fats are just fine is due to Gary Taubes. There is a mountain of research supporting the medical consensus to strictly limit saturated fats to avoid heart attacks. Here is a good starting point that reveals Taubes' selective and plain wrong use of research reports:
Wow, yeah. Then again, who knows if the conclusions here are based on the same flawed studies Taubes references. Being a non-scientist, it is quite a fatiguing process to try to make sense of the plethora of contradictory studies. Then on top of that, it's difficult to find someone that can compile them and draw a conclusion without themselves adding bias, or worse, completely misrepresenting the data (news organizations I'm looking at you...) Yeesh.
...or did my lenses get tinted by the "carbs are poison" crowd?