On trading with people we don't like

The story at this link is rather interesting. It discusses our trade relations with a few countries that we have issues with in the international arena, namely Iran and Venezuela.

One thing to think about when we trade with others: When we trade we most frequently trade with people we don't know. It is very impersonal. Even when we trade with Americans we likely trade with people, if we got to know them, we probably wouldn't like very much (different religion, they smell, they eat grits, or whatever). Yet we trade. We generally regard going to the store as something for our own benefit, not the benefit of the seller.