The latest controversy is maddening for many reasons. Tommy Robinson is a British political activist and “citizen journalist” who came to prominence in Britain almost a decade ago when he founded the English Defence League. The EDL was a street-protest movement in Britain whose aims could probably best be summarized as “anti-Islamization.” It emerged in the town of Luton after a group of local Islamists barracked the homecoming parade of a local regiment returning from service in Afghanistan. From their earliest protests the EDL’s members sought to highlight issues including sharia law, Islam’s attitudes toward minorities, and the phenomenon that...