There are so many reasons that nobody believes WorldNetDaily, and WND keeps serving up more of them.
A Feb. 10 WND article by Drew Zahn begins:
One of the FBI’s former top experts on Islam has announced that President Obama’s pick to head the Central Intelligence Agency, John Brennan, converted to Islam years ago in Saudi Arabia.
And who is this so-called "expert"? None other than John Guandolo, whom you might remember as a serial philanderer and adulterer who jeopardized a federal investigation by having sex with a witness and trying to get her to donate money to a right-wing "anti-terrorism" organization.
WND makes no mention of Guandolo's disgraceful behavior -- which arguably discredits his accusations -- despite WND editor Joseph Farah's insistence that WND follows "highest editorial standards and practices by experienced journalists." (Of course, you already know Farah is lying about that.)