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Starch converts to glucose, which is processed VERY differently from table sugar, sucrose, or the type of sugar found in fruit, fructose.

So, sugar is not all sugar. I believe Lustig has argued that the latter two are much worse than the former.

I agree overeating of carbs is not good, but is the reason why America is so fat because we just magically eat more bread, noodles, and potatoes than comparable countries? Probably not.

White bread literally has basically the same affect on blood sugar as an equal amount of sugar (by weight) as does processed (not whole wheat) pasta. It may be a bit delayed vs sugar's almost immediate absorption but the end result is quite on the same order.

You're conflating glucose and fructose. Fructose is the Lustig-argued toxic half of sugar that gets processed ~identically to ethanol by the liver.