It doesn't matter which cherry you pick, they all lead to the same conclusion: eating too many animals and not enough plants causes our most common diseases (obesity, heart disease, cancer, diabetes, stroke). Dr. Greger's agenda is not about the animals, it is about the people.
Yes, I do believe that, and yes Type II (not Type 1). According to Dr. Greger there is mounting evidence that fat is the cause, and that problems processing carbs is the symptom. Here are his videos with many studies cited: https://nutritionfacts.org/topics/diabetes/. Or Google type 2 diabetes and vegans. Here is the first thing I found: https://veganhealth.org/type-2-diabetes-in-vegans/. I'll take a 68% lower rate as some evidence. Vegans, by the way, are people who eat "too many plants and not enough animals". It helps with certain diseases.