The simple and quick answer is NO.
As for fat, it is necessary to clarify a few things. Of course, our body needs some fat as fuel for backup just in case, if you ever run out of fuel rapid in the form of sugar. But this does not mean that it should be the best source of fat to eat food of animal origin. There are also a vegetable fat. I do not mean those processed in the form of oils, but on seeds and nuts, the best source for fat people. Research has shown that in each cell is a small furnace, which burns off excess fat.
These ovens are called mitochondria. Scientists have wondered why mitochondria in case of problems with the fat cells do not perform their duties? Precisely because of failure of mitochondria cells become non-responsive to insulin. Research has shown that in case of excessive consumption of fat, that is, diets rich in food products of animal origin in the genes trigger mechanism that extinguishes mitochondrial function. When a man is meat, fish, eggs, milk and cheese, he shuts the natural system of burning surplus fat in the cells, which in turn lead to fatness cells, thus causing a problem with diabetes.
It’s not only the diet, you should exercise too!
The reasons we should not look only in the diet, but in our nature. The cells still function the same as before a million years ago, when there was no food in abundance. The body therefore essentially wants to help and off the mitochondria that you can fill up their fat reserves, but the problem arises when a man enjoys such food every day. Cells that are unable to distinguish, therefore, but only loading and loading excess fat, which brings us to the long-term costs of health and life. People are fatty diet became victims of their own natural defense system. To solve this dilemma, the only solution is the transition to a 100% plant-based diet that allows us all the necessary nutrients for a long, healthy and vital life. 
In order to convince scientists that there was perhaps a coincidence, they continued with their experiments and always got the same answer. More people as they put on a purely plant-based diet, the more they also welcomed. As soon as they returned back to the old diet rich in fat, the disease rapidly repeated. So for diabetics is no other way than to forever change your way of eating. As it is not as boring as you think, and some fear, but very interesting and delicious. It was also found that, for best results, must be eliminated all processed vegetable fat, that is, the use of vegetable oils is undesirable, since it hinders the healing process cells. Vegetable oils are therefore not part of a healthy plant nutrition. But in small quantities desired seeds and nuts. 
Scientists have also discovered that vegetable diet that contains no fat, also helps other serious patients.
The results of studies conducted by Dean Ornish, have shown that low-fat, plant nutrition extremely useful as cardiovascular patients who, because of his condition had surgery on clogged arteries. After a year of consuming such diets are completely healed, blood vessels, they are purified by itself. This is another great example of how success can be healthy vegetable diet in the treatment of the most serious diseases of our time. If a timely tackle changes, there is almost no incurable diseases. 
After all the research known to us can say with certainty that it is possible to avoid all the costly operations and even premature death, if, of course, timely care for lifestyle change, based on wholesome low-fat vegetable diet and exercise.
Dr. Neal Barnard in his book recommends three steps to begin treatment of diabetes :
Focus on eating whole grain cereals, pulses, vegetables and fruits. Avoid meat, poultry, fish, eggs and dairy products (yogurt, cheese, ice cream, butter, various creams, etc.). Also remove all oils, margarine, mayonnaise and other fatty refined products, even if the plant. Avoid fried foods. Do not eat avocados, olives and spreads from any nuts or seeds. Given fruits there are no limits, except for watermelon and pineapple, which have significantly higher GI than the rest of the fruit. Do not cook the potatoes, because the GI increases, preferring to eat cooked or sweet potato, which is the best alternative. Avoid processed cereal and vegetable product in general, always choose wholesome products that have not been previously processed. The most important thing is that with such a diet, there are no restrictions as it can eat so much that you’re full. Program offered by Barnard, no starvation and restriction. The man who adopts this program and it strictly adheres to several weeks, reporting significant successes. Therefore, it is worth a try. 
In conclusion, we can say that because of such successes recorded by physicians in the field of plant nutrition, it is true to say that the future is vegan. We have no other choice.