I am not the author of the post however I will give a little input.
The study does not look at other variables in the diet with respect to diabetes such as how much of the diet of the study participants was refined and processed foods (a possible influence).
In general we know the less animal protein and fat consumed the healthier the body tends to be and many studies verify this. Studies have shown us that an increase in triglycerides and cholesterol (animal fats)have increased the risk for diabetes and other health issues so I guess it seems logical that the cholesterol from eggs could also.
The body already produces cholesterol so it does not need it, it is not an essential fat. A diet rich in refined and processed foods is normally already high in cholesterol as well as sugar.
I occasionally have a free range egg but it is not a part of my normal routine.
I think the report is less than complete because it doesn't look at a study group of people that consume a healthy diet vs. the SAD.
To conclude; try to limit the consumption of animal foods and eggs to enhance your health. Increase the consumption of plants to improve overall health.
Wally Bishop C.N.C.