Complex sentence: Hezbollah says that the main source of its income comes from its own investment portfolios and donations by Muslims, however, Hezbollah actually receives most of its financial, training, weapons, explosives, political, diplomatic, and organizational aid from Iran and Syria.
Split into simpler sentences: Hezbollah says that the main source of its income comes from donations by Muslims. Hezbollah receives substantial amounts of financial, training, weapons, explosives, political, diplomatic, and organizational aid from Iran and Syria.