• The survey shows that although many Muslims are relative newcomers to the U.S., they are highly assimilated into American society. On balance, they believe that Muslims coming to the U.S. should try and adopt American customs, rather than trying to remain distinct from the larger society. And by nearly two-to-one (63%-32%) Muslim Americans do not see a conflict between being a devout Muslim and living in a modern society.
• Roughly two-thirds (65%) of adult Muslims in the U.S. were born elsewhere. Among native-born Muslims, roughly half are African American (20% of U.S. Muslims overall), many of whom are converts to Islam.
• Based on data from this survey, along with available Census Bureau data on immigrants' nativity and nationality, the Pew Research Center estimates the total population of Muslims in the United States at 2.35 million.
• Younger Muslims in the U.S. are much more likely than older Muslim Americans to say that suicide bombing in the defense of Islam can be at least sometimes justified. Nonetheless, absolute levels of support for Islamic extremism among Muslim Americans are quite low, especially when compared with Muslims around the world.
• A majority of Muslim Americans (53%) say it has become more difficult to be a Muslim in the United States since the Sept. 11 terrorist attacks.
• Relatively few Muslim Americans believe the U.S.-led war on terror is a sincere effort to reduce terrorism, and many doubt that Arabs were responsible for the 9/11 attacks. Just 40% of Muslim Americans say groups of Arabs carried out those attacks.

The survey (in PDF form) is available here. Pew has also posted the transcript of a very interesting press conference which was held to release the report. The transcript is here.