Three DIETS for three BLOOD types

Looking through information on the internet I found the three basic diets for three blood types: 

Blood Type A should avoid red meat, eat plenty of fish and vegetables, with a low dairy intake. Light exercise only.

Blood Type B should avoid chicken and bacon, eat plenty of meat and dairy, some fish, and plenty of fruit and vegetables.

Blood Type AB combines the A and B diets.

Peter D'Adamo, a physician, wrote a book called Eat Right 4 Your Type. He uses peoples research to come to the conclusion that he can determine diets based on peoples blood types. 

HIS LOGIC TO THIS DIET: 

He believes that the human blood type determines a person's health according to how healthy they are. This is hard to show because two people with the same blood types can be in different health conditions based on their metabolism rates. 

EXAMPLE DIET FOR BLOOD TYPE B: 

Breakfast
Fluidizer cocktail
Rice bran cereal with banana and skim milk
Grape juice

Lunch
Sandwich – thin slice of cheese, thin slice of turkey breast, two slices of bread, mustard or mayonnaise
Green salad
Herbal tea

Snack
Fruit juice sweetened yogurt
Herbal tea

Dinner
Broiled Fish with steamed vegetables
Fresh fruit
Herbal tea or coffee

SO HOW DOES THIS RELATE TO OUR DISCUSSIONS ON MITOCHONDRIAL EVE? 

D'Adamo discusses the evolutionary theory of blood types, using the work of William C. Boyd. Boyd had a experiment, using surveys that were conducted in many places determining peoples blood types. He divided the world population into 13 geographically different races with different blood types. If it started at Mitochondrial Eve, then how are there this many differences?