Who is Abu Mazen?

Six years ago I wrote a letter to then-President Bush in which I attempted to show why Mahmoud Abbas Abu Mazen is not a 'moderate.'

Abu Mazen is not a man of peace. He is an anti-Semite and at least an accessory to murder. Abu Mazen is a Holocaust denier.
He wrote his doctoral thesis in 1982 at the Moscow Institute for
Oriental Studies. The heading of his doctoral thesis was: "Zionist