If diabeties damages the blood cells and tissue throughout then body then will diabetes kill you?

No: Usually no. There are a few conditions of diabetes that can cause death but overwhelmingly it's the many serious complications of diabetes that leads to death, e.g., heart attack, infections, stroke. For all, the best mitigator is constant & excellent control of diabetes and high blood pressure.

No: If treated intensively from the onset diabetes patients will live a long and healthy life.