A proposal to build a US$100 million Islamic center two blocks from Ground Zero has sparked controversy in the US. While opponents say they are not against Islam, protests against similar mosques far from Ground Zero have raised fears that intolerance toward American Muslims is growing. One church plans to burn the Koran. 20% of Americans and 46% of Republicans believe Barack Obama is Muslim. A taxi driver in New York City was attacked after telling his passenger that he is Muslim.