The Islamic organization poised to build the largest mosque in the Northeast on a site in Roxbury has long-standing ties to an Egyptian cleric who praises suicide bombings and a Muslim activist indicted last week in a terrorism financing probe. The Islamic Society of Boston, which has city approval to build a sprawling $22 million Islamic cultural center and mosque on Malcolm X Boulevard, has had a long association with Dr. Yusuf Abdullah al-Qaradawi, whose vocal support of the Palestinian terrorist group Hamas prompted the State Department to bar him from entering the U.S. four years ago. The local religious...