Here's the thing, a lot of folks educating in dietetics are very much stuck on what they believe. There are, of course, the outliers who may differ from the norm, but most will be very tough to convince that the truth is different from what they "learned" in school.
I have a friend who is a sports nutritionist, and I had a discussion with her regarding Vitamin D and such not long ago. She was opposed initially, but I presented research and eventually convinced her to look it up herself. She did, and is now using said vitamin.
All that to say, I had an arguement with a PT professor regarding nutrition as well. No matter how eloquently I put it, or what studies I had to prove my point, or what in the trenches experience I could offer, I was wrong, because the textbook printed years ago said so. My undergraduate in Biochem does not trump her husband being a neurologist I suppose.
I would phrase your initial statement along the lines of something like "While mainstream knowledge has often pointed to the villifying of saturated fats and their supposed negative effects on the human body, more current research has found that, in fact, the opposite is more likely to be true, and that these fats may actually be an essential part of our daily diet..."
Commence referencing studies, and boom.