Sorry EB, but "heart failure" is a quite different problem than ischemic heart disease... and to the best of my understanding, heart failure is not associated with Diabetes. Atherosclerotic or Ischemic heart disease IS associated with poorly controlled Diabetes - the kind one can get by eating upwards of 45g carbs at every meal
As for what you have "been told" I suggest you do some reading and make up your own mind about some of these things - how many posts have you read here on DF about how we get outdated and/or just plain wrong information from our health care teams..? Doesn't that even raise the slightest doubt for you?
I challenge you to quote and source some solid scientific research which proves that saturated fat is "bad for your body".