FBI Violates Privacy

I find it frightening when an organization as powerful as the FBI starts to violate civil liberties.  As we discussed in the Minority Report thoughtcrime blog, no good can come of the government violating civil liberties.  I found an article from The New York Times that reveals such an instant where the FBI has violated the right to privacy and has also discriminated against people to weed out potential suspects that may, or may not, pose a national threat. 

In response to a suicide bombing in Africa by a Somalian in 2008, the FBI began to suspect people of terrorist attack based solely on ethnicity or religion rather than actual evidence.  In fact, for most cases, they had no evidence to support their accusations other than the persons ethnicity. The FBI would collect personal, and private, information about these 'suspects' without even having evidence that they had done anything wrong.  Not only are theses investigators discriminating certain ethnicity and religions, but they are digging into their private lives with no evidence to support that they are guilty at all.  The FBI has said that they have some other reasons to believe that these people pose a threat, but we of course can never really know how much evidence they have.  Is it at all justifiable for the FBI to investigate these 'suspects' almost solely on religion and ethnicity?  Is that enough?