He was a Mossad agent. Israeli banks helped him to launder the money. Sometimes, the Palestinians and their friends bemoan their inability to build up their own Arab lobby to counteract the Israeli lobby. They miss the most important point. The Israeli lobby should not be just a Palestinian concern, but the concern of all Americans.
Many American politicians support the swindle in order to remain in power.
For personal political ambitions, they betray the trust of their voters. John F. Kennedy told Gore Vidal, that in 1948, Harry Truman was on the verge of losing the presidential election, but a Zionist supporter brought to him 2 million dollars cash and saved his skin. It caused America to vote for the creation of the Jewish State. This pattern perpetuates itself. The politicians take bribes, sell pardons, accept 'donations', and help the Israeli lobby to rob the people of America.