November 27, 2004 THE SATURDAY PROFILE The Fear Born of a Much Too Personal Look at Jihad By RICHARD BERNSTEIN BREMEN, Germany THE first thing to know about the woman known widely here as Doris Glück is that Doris Glück is not her real name. She won't tell you her given name, or even her official new name - provided by the German police - beyond the first name and initial, Regina S. She won't say where she lives, either, and when she meets you at the railroad station in Bremen, she is clearly anxious to get away quickly lest...