ISIS is seducing people you know.
But we all think this guy Khalid Masood was acting alone. Of course he probably is influenced by newspaper headlines about the war in Syria and by his own radical links in the past. But what actually made him do this yesterday looks planned - the gates to Palace yard were open for voting MPs to come in quickly and make their votes - they are normally shut. So perhaps this terrorist knew they would be open or else he was being opportunistic. whatever the case maybe he was intent on killing as many as possible and intent getting as close to parliament as possible.