In November 2014, the U.S. Treasury Undersecretary for Terrorism and Financial Intelligence, David Cohen, described Qatar as operating an environment that is tolerant of terrorism financing.[18]
U.S. counterterrorism officials have said that donations from countries outside the U.S. have been a traditional source of financing for terrorism. A small part of ISIS’s financing operations comes from such donations.[19]
Abdul Karim al-Thani, a member of Qatar’s royal family, ran a safe house for Abu Musab al-Zarqawi, the founder of Al-Qaeda in Iraq, the predecessor to ISIS. Al-Thani gave Qatari passports out and put $1 million into a bank account to finance AQI.[20]
Abd al Rahman al Nuaymi, a Qatari citizen, worked as a go-between between ISIS’s predecessor, Al-Qaeda in Iraq (AQI), and donors to AQI from Qatar.[21]
https://en.wikipedia.org/wiki/Qatar_...r_finance#ISIS