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.
For starters, there is no political Jewish control.. For evident historical reasons, Jews have an intense interest in politics. They have had a tumultuous and sometimes terrible history: to protect themselves from future disasters, Jews in the United States and elsewhere tend to pay close attention to politics.