You have got to be fucking kidding me.
For a long time, we had falsely believed that carbohydrate was our best energy source because it neither was greasy nor caused us fat, and that we could not live without it. Now, we know that carbohydrate can harm our health and develop diseases such as morbid obesity, diabetes mellitus, cardiovascular diseases, cancer, Alzheimer’s disease, and many more.
I could very easily claim that "fat" is an agent of disease, and I would be 100% correct, as long as I made no effort to differentiate between naturally occurring fats, and hydrogenated & oxidized ones, and those from plants that shouldn't even be consumed in the first place (cotton).
The fact remains that there really is no such thing as "carbohydrate". There is sugar, a wide variety of starches (some highly toxic, some slightly toxic, some not at all), resistant starch, soluble fiber, insoluble fiber, etc. All of which behave so wildly different that it's intellectually dishonest to classify them in the same macronutrient group. And this kind of idiocy is the result; people making claims like, "starch is toxic", that fruits are superior to tubers because they "don't spike insulin,", that insulin makes you fat, and living in fear of the metabolic reign of terror that lentils and quinoa have wreaked on human civilization.
Just from reading the comments, it's pretty clear which group shows more intellectual curiosity. The low-carbers just come across as defensive, and most of them are just blatantly chanting slogans without addressing the debate.
“The whole concept of a macronutrient, like that of a calorie, is determining our language game in such a way that the conversation is not making sense." - Dr. Kurt Harris