I'm speaking with Mark Potok, director of the Intelligence Project of the Southern Poverty Law Center, which keeps track of hate groups in the U.S., and Randy Blazak, an associate professor at Portland State University, who also studies hate groups.

NPR: The Tipping Point: When Hate Turns To Violence

According to the FBI compilation of hate crime statistics in the U.S., drawn from between eleven and fifteen thousand participating federal, state, and local agencies, since and including 2001, hate crimes against Muslims in the United States have averaged about 2% of all reported hate crimes each year.

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The project is dedicated to monitoring hate groups and extremist activity in the U.S. He joined us from his office in Montgomery, Alabama.

NPR: The Tipping Point: When Hate Turns To Violence

Despite the heinous nature of the crime, the state court imposed lenient sentences, so the Civil Rights Division of the U.S. Department of Justice charged the assailants under the federal hate crimes law on the books at the time.

WHITEHOUSE: Initiative on Asian Americans and Pacific Islanders Blog

The litany of federal charges against the alleged ringleader and her posse is the first hate crime case of its kind -- the victims were mentally and physically disabled, the U.S. Attorney's Office said.

CNN: STORY HIGHLIGHTS