"If we do something foolish, like drink glassfuls of milk..."
... is part of an exact quote from Dr. John McDougall in this 9 minute video on how dairy and animal foods cause auto immune diseases like diabetes I, colitis, leaky gut, and others.
Dr. McDougall says: "As many as three million Americans may have type 1 diabetes, and each year more than 15,000 children and 15,000 adults are diagnosed with type 1 diabetes.
But there's a pretty straightforward way to avoid it altogether:
Don't consume dairy products or consume animal proteins --
but especially milk, cheese and other milk products.
The same is true for myriad other autoimmune diseases, such as arthritis, colitis, lupus and many more."
http://www.vegsource.com/news/2011/05/dr-mcdougall-type-1-diabetes-caused-by-milk-video.html
Scroll down for the video.