Natural, saturated fats like butter and lard are good for you. The smear campaign against them is just based on bad science from the more profitable refined vegetable oil producers.
I take issue with this statement. There is a lot of evidence that the incorrect balance of omegas in people's diets (from eating milk and animal fats from non-pasture-fed animals) sets a whole inflammatory process in motion in the body (precursor to the development of cancer, diabetes, arthritis, etc). It is much healthier to eat a high proportion of oils that are high in omega 3s (fish, olive, flaxseed) than those high in omega 6s (non-grass-fed dairy and red meat fats, including butter, vegetable oils such as corn, sunflower, safflower, soy and yes that includes most margarines). Yes Butter is preferable to margarine, but it's most beneficial to consider substituting some of the healthier unprocessed vegetable oils for that animal fat.