first we need to establish an operable definition of what is considered 'extreme'.
were those of us who participated in the occupy movement extremists? many of the people involved had very strong anti government leanings, there were regular clashes with law enforcement, activists were subjected to surveillance efforts. is greenpeace extremist? what about animal rights activists? both have certainly engaged in far more concerted, adversarial and questionably legal efforts for their causes than a bunch of cringey and belligerent migapedes who offend the cultural sensibilities of coastal bloggers.
this becomes a problem as well, proud boys have been involved in violence... against other groups who were also actively seeking to enforce street violence. is this the result of a concerted campaign or does a group founded around crudity and bravado attract absolute knuckledragging choads who are likely to get into fistfights?