CEP Senior Director Dr. Hans-Jakob Schindler interviewed: "This is an extraordinary, difficult endeavor because there is this still functioning underground system in particular in the southern half of Gaza. But Sinwar really is the key leader to get here. He was, from the very beginning, part of setting up the terrorist structure of Hamas from 1988 onwards. He was also the founder of the Gaza Hamas intelligence organization that hunts what they call collaborators, those who collaborate with Israel, and executes with them." 

"Although the U.S. and the European Union have designated Hamas as a terrorist organization, 'they’re not effectively cut off from the international financial system,' said Hans-Jakob Schindler, senior director of the Counter Extremism Project. 'They actually are able to invest funds in companies and in real estate.'
...
Cryptocurrencies have helped the group invest its money while bypassing international financial sanctions according to a report by the Counter Extremism Project."

"'PIJ is dedicated to eradicating Israel and establishing an autonomous Islamic Palestinian state in the lands currently comprising Israel, the West Bank, and Gaza...PIJ believes its goal of creating an Islamic Palestine can be achieved only through the destruction of Israel, and so jihad has become a central tenant of PIJ’s ideology. In pursuit of its jihadist ideology, PIJ has launched numerous bombing attacks against Israeli civilian targets,' notes think tank Counter Extremism Project (CEP), adding that PIJ refuses to negotiate with Israel and rejects the proposed two-state solution."

"Think tank Counter Extremism Project (CEP) says, 'The group’s ideology blends Islamism and Palestinian nationalism and seeks the destruction of Israel and the creation of an Islamic state between the Mediterranean Sea and the Jordan River...Hamas’s preferred methods include suicide bombings, rocket and mortar attacks, shootings, and kidnappings.'"