Yves Goldstein makes no excuses for Belgium's failure to find Salah Abdeslam and the other Islamic State recruits who attacked Paris and then bombed Brussels Airport and a subway station.
The problem is not Islam, he insists, but the negligence of government officials like himself in allowing self-contained ethnic ghettos to grow unchallenged, breeding anger, crime and radicalism among youth — a soup of grievances that suits Islamist recruiters.
"Our cities are facing a huge problem, maybe the largest since World War II," Mr. Goldstein said. "How is it that people who were born here in Brussels, in Paris, can call heroes the people who commit violence and terror? That is the real question we're facing."