Inuit have unique gene differences (obvious), those may give them an ability to metabolize fat better. However there is some evidence that Inuit that eat western diets have the same rate of heart disease as us and westerners who eat their diet have the same rate of heart disease as them? (from "Good Calories, Bad Calories" by Gary Taubes).

I think they are coming from an assumption (which is possibly incorrect) that eating fatty meats causes heart disease. So they are trying to solve a mystery but the entire foundation for their search is in question IMO.

It is interesting either way. Maybe if we keep eating high fructose corn syrup and refined grains, this obesity and heart disease epidemic will just cause selection for a few generations that will result in us as a population being able to live nicely eating all this shit we eat now.