When I learned that the suspect in the Toronto van attack had apparently posted a Facebook message identifying himself as a foot soldier in what he called the “incel rebellion,” I was saddened but not at all surprised. As the keeper of a blog devoted to tracking the culture of misogyny online, I have been watching the “incel” subculture for seven years – and I find its rise in the past several years to be nearly as disturbing as the recent rebirth of the neo-Nazi right. Incel, as many Canadians have learned this past week, is short for “involuntary celibate,”...