To understand how 6.2 million Jews in the US control the country would require a whole book. Simply put, a small number of very rich Jews control politicians of both parties by making donations. They use a small carrot and big stick approach. They contribute a small amount to all politicians. If they vote against Israel then they contribute a large amount to their opponent. Each US politician answers to a Jew appointed to monitor them. Plus, Jews also own the media which is critical to win elections.
Different groups are given different things to support Israel. Evangelical preachers are in their pockets and use biblical narrative to support Israel. The defense industry gets funding to make wars, academics get funding for research, the oil industry gets high oil prices. And so on.
In short, everyone gets some benefit from supporting Israel.