A group of progressive Muslim-Americans plans to build an Islamic community center two and a half blocks from ground zero in lower Manhattan. They have had a mosque in the same neighborhood for many years. There's another mosque two blocks away from the site. City officials support the project. Muslims have been praying at the Pentagon, the other building hit on Sept. 11, for many years.

In short, there is no good reason that the Cordoba House project should have been a major national news story, let alone controversy. And yet it has become just that, dominating the political conversation for weeks and prompting such a backlash that, according to a new poll, nearly 7 in 10 Americans now say they oppose the project. How did the Cordoba House become so toxic, so fast?