The law center is known for its successful litigation against white supremacist groups such as the Ku Klux Klan and the Aryan Nations .
The law center has monitored extremist groups and hate speech for 40 years .
The law center , which has monitored extremist groups and hate speech for 40 years , is known for its successful litigation against white supremacist groups such as the Ku Klux Klan and the Aryan Nations .