Trump said the consequences of an exit from Afghanistan "are both predictable and unacceptable. 9/11, the worst terrorist attack in our history, was planned and directed from Afghanistan because that country was ruled by a government that gave comfort and shelter to terrorists. A hasty withdrawal would create a vacuum that terrorists, including ISIS and al Qaeda, would instantly fill, just as happened before September 11th."
In order to believe this, facts must be put aside and the official version of events be unquestioningly accepted. There is no evidence the attack of September 11 was "planned and directed from Afghanistan." Then Secretary of State Colin Powell said two weeks after the attack he would "in the near future… to put out… a document that will describe quite clearly the evidence that we have linking [Osama bin Laden] to this attack."