Shirazi is the founder of Islamic Oasis, a Chicago-based charity that operates a mosque, school, and community center. The organization has ties to extremist groups, opaque finances, and pro-Taliban operations. Shirazi was affiliated with the Muslim Students Association (MSA) and Hizb ut-Tahrir (HuT), which was banned in the UK in 2024. Shirazi praised violent jihad and posted Hamas terrorist propaganda after the October 7, 2023, attack in which more than 1,200 Israeli civilians were killed. Islamic Oasis has expressed support for convicted terrorist Aafia Siddiqui, collaborated with One Nation, and worked alongside Shajul Islam, a UK physician accused of kidnapping journalists. In Afghanistan, Islamic Oasis works with the German-British Qamar Charity Foundation supporting Taliban governance and education programs. The group has explored using cryptocurrency to bypass financial oversight and encouraged Western Muslims to help build the Caliphate. Despite being U.S.-registered nonprofit, Islamic Oasis has facilitated radical activities abroad and operates with minimal transparency.