The point being, whether it's Measel infested blanket givers or a really good car idea by a khaki wearing maniac, there's plenty of reasons to hate just about every nationality ever.
If you would like to boycott every single product associated with every country that did something awful, start becoming self sufficient - there's blood on everybodies hands.
Or you can decide that it's often the leadership that makes the mistake, and most normal people in the world are pretty much the same. Your choice.