Please answer a question about the following article about Gamal Abdel Nasser:

Zakaria Mohieddin, who was Nasser's vice president, said that Nasser gradually changed during his reign. He ceased consulting his colleagues and made more and more of the decisions himself. Although Nasser repeatedly said that a war with Israel will start at a time of his, or Arab, choosing, on 1967 he started a bluffing game "but a successful bluff means your opponent must not know which cards you are holding. In this case Nasser's opponent could see his hand in the mirror and knew he was only holding a pair of deuces" and Nasser knew that his army is not prepared yet. "All of this was out of character...His tendencies in this regard may have been accentuated by diabetes... That was the only rational explanation for his actions in 1967".

What did Mohieddin attribute Nassir's mistakes in 1967 to?
diabetes