These Are The 4 Types Of Serial Killers
The third type, Mission-oriented killers, are out to "rid" society of a particular group and follow an internal paradigm that calls for only one effective solution: cold-blooded murder. Generally speaking, there's a racial/social/religious angle involved, as the killer often discriminates against a specific faction of people in society that he or she deems unworthy or destructive to certain ethical structures (via This Interests Me).
Joseph Franklin was a self-proclaimed white supremacist who began his spree of murders in 1977. He said his goal was to rid society of Black and Jewish individuals and incite others of his hateful persuasion to do the same. In July of '77, he bombed a Tennessee synagogue. Just a few days later, he killed two men in a parking lot in Wisconsin. He is most infamous for using a sniper rifle to target victims, and authorities believe he may have killed up to 20 people prior to his arrest on October 28, 1980 (via FBI).