From the article:
Keller also criticized prominent pastors, such as Joel Osteen of Lakewood Church, who recently appeared on CNN's "The Situation Room with Wolf Blitzer" and said, "Mormonism is a little different, but I still see them as brothers in Christ." The Texas minister insisted that he fully trusts that Romney is indeed a true and faithful Christian...Keller, however, said that those were false testaments. "There is not one theologian in the country with half a brain that will even begin to say that a Mormon is a Christian, because if you study Mormon theology – it is 100 percent inconsistent with biblical Christianity. A Mormon is no more a Christian than a Muslim is," he said. "I have a lot of connections out West with ministries that help Mormons leave that cult and they've been working for over a year preparing for a Romney presidency – because this is what they need to make their cult mainstream. And we have such a weak and watered down church system – we have idiots like Joel Osteen running around making dangerous comments that Mormons are Christians. You have got to be a theological midget to say that. (Perhaps Osteen can go on a lecture tour, telling us how fundamentalist Mormons, Jehovah's Witnesses, Scientologists, etc. are also representative of "Christianity")