That link is misleading. Obesity doesn't cause T2 diabetes. Too much circulating insulin is a major cause of T2 diabetes. (there are other causes causes). Too much circulating insulin is caused by a high carb intake, and too much circulating insulin is a cause of obesity and insulin resistance. Unless carb consumption is restricted, it all becomes a vicious circle - insulin levels remain too high, more weight gain, more insulin resistance, T2 becomes worse. The aim should be to reduce the circulating insulin by reducing carbs, this will help improve IR, help with weight loss if necessary, and improve T2 control.
http://bjgp.org/content/67/657/158.3
Thanks for the link
@Bluetit1802; it made for interesting reading
I did see this though:
"Eating starch is eating glucose, which requires a corresponding insulin response. An insulin response with every snack and meal for years can,
in genetically vulnerable people, cause insulin resistance with variable expression among people and among different body tissues."
So we can see that, even the article you kindly shared, that there isn't just one factor in the development of T2. So we can't just blame carbs.
Further to your comment about surplus circulating insulin - that's IR right? It's known that IR can be combatted pretty effectively through exercise. So unless all those who became IR and ultimately diabetic were getting the minimum recommended amount of exercise daily, we can't rule out lifestyle either as a potential cause.
I don't mean to debate the mechanics around developing T2D; but I'm demonstrating that there is a lot more to blame than carbs themselves. You really can't blame toast alone for the development of a chronic condition.
But back to the original question, are carbs poison - no they're not. If you want to class carbs as poison, then we must class all foods which have the potential to cause harm as poison. That includes nuts, dairy, fish, meat, the list goes on...There is always someone who will react to something, but you can't label it a poison just because of that.