There is no such thing as "extremists"; only politicals and apoliticals (i.e. the politically naive or ignorant who are no threat to the capitalist order).
The ruling class has always chopped down effective working class leaders and revolutionaries. We [the oppressed] will; and should; chop you [the oppressors] down too.
To those who resist; do not be fooled; the ruling class are "extremists"; history has proved that.