Potential Egyptian presidential candidate Mohamed ElBaradei led thousands of people on Friday in an anti-torture protest that analysts said was significant for joining disparate groups in a common cause. Around 4,000 people, representing varied political views, and many ordinary citizens greeted ElBaradei, 68, the former nuclear inspector, as he visited the port city of Alexandria to offer condolences to the family of Khaled Mohammed Said, an Egyptian who rights groups say was beaten to death by police.