The french diet is high in cheese and fattier types of meats and yet they have one of the lower rates of death via heart and artery diseases
American and the UK on the other hand get all their saturated fats from procossed shitty foods, hydrogenated vegetable oil and hundreds of other cheap crappy ingredients used by big manufacturing companies
the big factor that makes the difference is also the amount of carbs in the diets of Americans, British people and other similar countries, the fact that people eat so many crappy carbohydrate sources means they burn carbs for their primary source of fuel. Their bodies dont effeciently use up the fats it is fed which is why a lot is stored. Hence why you can eat a high fat/low carb diet and not put yourself at massive health risks; your body adapts and uses up the fats as fuel throughout the day and saves carbs for intense exercise.
well anyway that's what I've read.