Thanks! Limburgish, Dutch and German.
I also understand and speak basic phrases in Japanese and Korean, speak a little bit French, can understand some Spanish etc. I have a thing for languages lol.
I personally feel, based on the research I've read, that the blame lies mostly with the fact many carbs we consume are heavily processed, and since around the 80's-90's, the low fat diet became 'the' diet to follow. Fat was the enemy for decades, while being substituted with processed simple carbs to keep the flavor intact. I believe we're feeling the effects of this change more and more, especially as the adult generation of that time is now growing older and suffering the long-lasting effects of this diet.
I also think this is why vegans who are on a low fat high carb diet aren't sick as much and have lowered risks for diabetes; their carbs are unprocessed and consumed with a great amount of fiber generally speaking, and combined with adequate exercise.
(I also want to clarify that I'm speaking mainly about non-diabetics for this, we're obviously playing a different game with our conditions and even whole carbs affect us way differently now.)