Google gives ‘about 515,000 results’ for the search “Obama is the AntiChrist.” From Newsweek:

According to a 2006 study by the Pew Forum on Religion & Public Life, a third of white evangelicals believe the world will end in their lifetimes. These mostly conservative Christians believe a great battle is imminent. After years of tribulation—natural disasters, other cataclysms (such as the collapse of financial markets)—God’s armies will vanquish armies led by the Antichrist himself. He will be a sweet-talking world leader who gathers governments and economies under his command to further his own evil agenda. In this world view, “the spread of secular progressive ideas is a prelude to the enslavement of mankind,” explains Richard Landes, former director of the Center for Millennial Studies at Boston University.

No wonder, then, that Obama triggers such fear in the hearts of America’s millennialist Christians. Mat Staver, dean of Liberty University’s law school, says he does not believe Obama is the Antichrist, but he can see how others might. Obama’s own use of religious rhetoric belies his liberal positions on abortion and traditional marriage, Staver says, positions that “religious conservatives believe will threaten their freedom.” The people who believe Obama is the Antichrist are perhaps jumping to conclusions, but they’re not nuts: “They are expressing a concern and a fear that is widely shared,” Staver says.
http://www.thedailybeast.com/newsweek/2008/11/15/is-obama-the-antichrist.html

Idiots like Staver and Jones are encouraging some unstable people to act on their fantasies.