Excerpt:

The mosque where at least one of the two suspected Boston Marathon bombers prayed has a controversial history, with ties to the Muslim Brotherhood, terror funding and frequent fiery sermons, according to a group that has long monitored the house of worship.

"This is a radical mosque," Dennis Hale, of a Boston-based group called Americans for Peace and Tolerance, said of the Islamic Society of Boston.

No one from the law enforcement community has publicly suggested that the mosque, located in the brothers' Cambridge neighborhood, played any official role in radicalizing either Tamerlan Tsarnaev or his younger brother, Dzhokhar Tsarnaev.  But Hale, also a professor of political science at Boston College, said there's reason for concern.


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