extremism

His opponents have argued his writings suggest that authorities should use an individual’s public support for controversial causes as a potential warning sign of extremism.

He was also attracted to political extremism and fascinated by violence.

As Kirk’s shooting triggers furious debate on the perils of left versus right political violence, there is little consensus among Americans on what extremism is, who is perpetrating it and when it is justified.

Given the reactionary extremism that characterizes power in today’s world, it is also timely.

And it was, Cynthia Miller-Idriss, one of the nation’s leading experts in violence and extremism, said to a D.C. crowd last weekend.