Why do Americans not want to accept Venezuela's oil?

I mean it is not any harm to the country. The oil Hugo Chavez is giving away is for the poor people in the United States to warm their houses up. Why is it that you don't want to accept the oil? Do you think you are the rich and powerful nation who helps other nations but you feel humiliated if somebody tries to help you? I know he talked trash about President Bush but hey the help is still there. This reminds me of a man I used to know who claimed that Mexico didn't have an army and the "non-existing" Mexican Army was then helping the victims of Hurricane Katrina.