I'm not sure if it's this specific one but a study with the same kind of conclusion has been debunked when it comes to a causal relationship, as it turned out it did not control for any other factors like exercise, diet and other habits. Of course increased egg consumption leads to diabetes if those people also eat more overall, smoke and don't exercise.

> the average daily consumption of eggs increased continuously from 16 grams in 1991-93, to 26 grams in 2000-04, and 31 grams in 2009.

...and at the same time, the WHO says[0]:

> Worldwide obesity has nearly tripled since 1975.

I don't think this needs to worry people who just like eggs a lot and otherwise maintain a healthy lifestyle.

[0]: https://www.who.int/news-room/fact-sheets/detail/obesity-and...