"Hundreds of Islamic centers in the United States have become a hot-bed of extremist activity; they promote violence, terrorism and hatred against America.
“Our initial investigation has concluded there are between 400 to 500 radical Islamic centers in the U.S.,” said David Gaubatz, the director of counterintelligence and counterterrorism for the Society of Americans for National Existence. “In those places, they preach an extreme version of Islam that says America and the West is the enemy. They espouse violence, hatred and the need for terrorism.” (source)
But, hey, let's not profile 'cause that would be wrong and misguided. /sarcasm