I personally could never eat the way Bernstein outlines but I always like to hear his thoughts on a subject. I think his thoughts in the video on cholesterol are interesting. The Bernstein diet is some what obsoleted now that afrezza is available but few are using it.
On BG control his rationale behind his approach is what he calls “the law of small numbers”. The thought is there is always inevitable error in predicting the insulin dose to cover a meal and this error is bigger when the meal is high-carb and the required insulin dose is bigger. In other words, taking small doses of insulin to cover a small dose of slow-acting carbs prevents inadvertent big under/over dosing that could cause dangerous spikes and crashes in blood sugar.