The terrorist mayhem in Brussels has again produced the predictable hand-wringing about its causes. And again, as in France after last November’s attacks, the focus has been largely misplaced. Most of the attention has been directed to the role played by ISIS in organizing and carrying out the attacks. In doing that, pundits and officials alike have, willingly or not, diverted attention from the single most important fact in this matter — the presence of a huge and rapidly growing radical Islamic community in the middle of Europe. It is this community motivated by a hateful Islamo-fascist ideology that has become the main supplier of radical jihadists to the terrorists in the Middle East and not vice versa.