Oil is a global commodity. All oil is fungible. Whether we buy it or not doesn't matter since oil is a commodity in high demand. These "proceeds" will be available to the producers regardless of where we spend our money.
Canada is our biggest trading partner. 23% of our exports go there and 17.4% of our imports come from Canada, followed by China 13.3%, Mexico 10.6%, Japan 8.8%, and Germany 5.2%.
What specific countries are you referring to in terms of oil purchases that help fund terrorists? Here is a list of countries we import oil from and the amounts
“What specific countries are you referring to in terms of oil purchases that help fund terrorists?”
Saudi Arabia