Agents enter dual agency when they represent both the seller and the buyer. Dual agency can happen even if the there are two agents involved -- a listing agent and a buyer's agent -- if both agents work for the same broker. That's because it is the real estate broker who creates agency.
The notion of Jewish control of the United States is utter nonsense. Jews are a capable people who have, through hard-work, gained a disproportionate role in some aspects of American life. But they in no way dominate the country.
The United States emerged from the war as clearly the greatest power in the world as well as the creditor nation of the world. These circumstances thrust the United States into a position as world leaders, while the American people still assumed that Europe had little to do with America.