It’s unlikely that Martin Gugino, the 75-year-old activist labeled an “antifa provocateur” by Donald Trump this week for the sin of being knocked to the pavement on video by police in Buffalo, New York, ever in fact identified as a member of an “antifa” group. Not that it would make any difference to Trump, who only wanted to dehumanize and demonize the man by casting him as an embodiment of the right’s favorite bogeyman in the Trump era. For most Americans, the first question is: What the hell is “antifa” anyway?