Hamas and ISIS finance themselves through a global network of private supporters. According to terrorism expert Hans-Jakob Schindler, this generates millions, often through many small individual donations, including from Germany. They often disguise their activities as humanitarian aid in order to obtain money. According to Schindler, they sometimes even blackmail aid organizations in crisis areas. IS is particularly active in Germany. After attacks, it deliberately spreads new messages to demonstrate strength, attract new donors, and prepare further attacks. Islamists, whether from IS or Hamas, operate their own propaganda channels on the Telegram platform, spreading messages and actively soliciting donations.