The senseless murder in Uxbridge demands a reckoning on illegal migration.A man is dead, and a nation is seething. The blood-curdling murder on Monday night of Wayne Broadhurst, who stepped out at 5pm to walk his dog and never returned home, has left his neighbours along with millions of his countrymen wondering ‘what if?’. What if they had turned a corner as Broadhurst did, only to have a knifeman rain blow after blow down upon them. The killing in Uxbridge, a suburban town in the western reaches of Greater London, speaks to fears that run wide and deep.Broadhurst was 49....