[Undertoad]

Kinda knew this:

The survey showed that a majority agreed with the false statement that since the Second World War the US had more often sided with non-Muslims when they had come into conflict with Muslims. In fact in 11 out of 12 major conflicts between Muslims and non-Muslims, Muslims and secular forces, or Arabs and non-Arabs, the US has sided with the former group. Those conflicts included Turkey and Greece, Bosnia and Yugoslavia, and and Kosovo and Yugoslavia.

Asked if it was true that "from 1973 to 1990 the United States sold Saddam Hussein more than a quarter of his weapons," 80 per cent of British respondents said yes. However the US sold just 0.46 per cent of Saddam's arsenal to him, compared to Russia's 57 per cent, France's 13 per cent and China's 12 per cent.
...
Almost a third of Britons believe that "Americans who have not paid their hospitals fees or insurance premiums are not entitled to emergency medical care"; by law such treatment must be provided.

More than half the respondents believed that polygamy is legal in some US states, while it is illegal in all US states.

The second item is also a point of confusion for Americans. We've dealt with it here before. That last one is just weird. There are so many more legitimate reasons to hate us.