...Once again, the United States is using its financial system as a weapon.
...But if a bank were to be kicked out of the US banking system, it would be incredibly detrimental to its ability to hold and transact in US dollars. And hence quite difficult to participate in global trade and finance.
This financial leverage is an unbelievable advantage for the United States, and is a result of the rest of the world placing a great deal of trust in the US government.