Community leader Dr. Ahmad Jaber, a Bay Ridge doctor known for founding the civil rights organization the Arab American Association of New York, died Dec. 10 at the age of 73. Born in the Palestinian village of Yamoun, Dr. Jaber emigrated to the United States in 1974 and launched his medical career as a resident at NYU Langone-Brooklyn, formerly Lutheran Medical Center, in Sunset Park. He went on to become a board-certified OB-GYN before opening a private practice in Bay Ridge, where he long resided. In addition to delivering more than 5,000 babies over the course of his career, Dr. Jaber was known for his community involvement and …