How can the Rev. Terry Jones – or any human being – believe and say “the Koran is evil because it espouses something other than biblical truth …” ?

Sorry to reopen this topic, but I’m utterly flabberghasted by the Florida pastor’s quote, not only because it’s so horribly inflammatory, but more so, because I don’t understand how he or anyone can be so knowing as to believe Christianity is the only truth. Quote source