It seemed that very many of us in North America quit worrying about butter in our diets, six or seven years ago. It was all over the news that medical research had shown that health issues related to blood cholesterol actually had little or nothing to do with human dietary intake.
Olive oil and fish oils are of course good, but butter was not bad. A huger proportion of the population breathed a sigh of relief! Now it seems that there are yet, at least in still-existing internet sites, those sources that warn about butter (milk fat) in the diet.
Okay, just a personal association here... The "butter okay" info of only a few years ago seemed to conflate, in my mind, with the somewhat earlier announcements about the "Mediterranean diet" being a good guide for health. Of course, obviously the Mediterranean region is shared by a number of nations. And, for instance, Italians go in heavily for olive oil, the French for butter. (I've been to Italy — and the Italians love pizza, or nearly anything with cheese in or on it.)
Confusing. So... what can you tell me?