We have an ethical obligation to stand against fascists and racists in a way that doesn't help them.
Two Italian scholars who fled fascism in the 1920s urgently warned that American democracy was vulnerable to the same gradual erosion as in Italy. Their message still rings true today.
Comparisons of foreign volunteers in Syria to the International Brigades of Spain are apt, but not for the reasons you think.
Previous efforts to cement national cohesion offer a model but also, says a historian, a warning.