Oh, Jesus Christ... Okay, I'm pretty sure this a correlation/causation thing.
Let me ask you, where do you usually eat french fries in the United States? Think about it for a minute.
Did you answer at a fast food place? Because while I don't have any data on hand I'm pretty sure that's the correct answer. At least I know that's where I eat most of my fries. So assuming that's correct the headline transforms to "People who regularly eat fast food are at higher risk for diabetes".
No fucking duh.