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Hate groups have intensified their rhetoric in recent months
An FBI investigator looks over gunshot holes in the door of the U.S. Holocaust Museum on Thursday.

An FBI investigator looks over gunshot holes in the door of the U.S. Holocaust Museum on Thursday.

"The traffic [on online hate discussion groups] has really been high, and there are more people who feel their voice isn't being represented," said Randy Blazak, associate professor at Portland State University in Oregon and director of the Hate Crime Research Network.

The number of active hate groups in the United States rose from 602 in 2000 to 926 in 2008 -- an increase of 54 percent -- according to the Alabama-based Southern Poverty Law Center. Video Watch former federal official discuss U.S. hate groups ยป

The center and other researchers caution that some of the increase could be due to the splintering of larger groups. Still, hate groups' activity and vitriol on Web sites have spiked in recent months
If you're not on board with the social change, then you're increasingly alienated