Carbs create T2 diabetes. I never fail to be stunned when I realize that there are still people who don’t get this.
...and raise LDL and Triglycerides.
My fasting blood sugar was approaching 100. My doc told me "Blood glucose is the rumble strip of life. You either wake up and manage it now or you will die young."
My grandfather's generation consumed a diet loaded with carbohydrates yet diabetes and obesity were almost unknown. Many of these folks were employed in agriculture and worked like hell. Even the people employed elsewhere, for the most part, worked like hell. No obesity, no diabetes.
Demonizing one macronutrient over another is a common trait of diet fads and is, naturally, supported by the people who want to sell books touting the fads.
History has proven over and over again that you can sell diet advice more easily if you claim that fats or carbs are the problem – while the obvious idea that calories are the problem seems to be something that few are prepared to pay for.