Thanks to Vasari for directing me to the Southern Poverty Law Center:
A synopsis of radical-right terrorist plots, conspiracies and racist rampages since the Oklahoma City bombing in 1995. It includes a roster of murdered law enforcement officials.
And, hey kids! For a fun social studies project, check out this cool interactive map of hate groups.
Click State Totals at the top of this neat page to FIND OUT HOW MANY HATE GROUPS THERE ARE IN YOUR STATE!