The sanctity of human life should not be based upon nationality. The fact that many innocent people are executed each year should make the idea of capital punishment abhorent to any civilised nation. The Idi Amins and Robert Mugabes of this world are monsters and no right thinking person would want to be identified with them.
But then, there are so many evil people around the world - on both sides of situations, criminals that kill and bent authorities that use the death penalty to silence their critics.