The role of fats in heart disease is an evolving opinion, but certainly most research hospitals suggest polyunsaturated fats are much healthier and in fact a necessary component to most people's diet. Omega 3 and 6 fish oils, for example, are prescribed universally to people with Cardiac Artery Disease, and fish oil is certainly a Poly oil.
I haven't a clue about cashews, I'm a Hazelnut (Filbert) fan myself. They are delicious in salads.
No wonder heart disease skyrockets with that "healthy" advice about polyunsaturated oils. Polyunsaturated fats (or PUFAs) are highly inflammatory and highly prone to oxidation. Inflammation and oxidation is a nice recipe for heart disease.
Went to their web page and copied the following----
"Unsaturated fats, which can be monounsaturated fats (for example olive oil, rapeseed oil, almonds, unsalted cashews and avocado) or polyunsaturated fats (including sunflower oil and vegetable oil, walnuts and sunflower seeds), are a healthier choice."
Didn't say anything about avoiding unsalted cashews unless i nissed something