The majority of psychological research so far was focused on showing that people holding right-wing political beliefs, in comparison to left-wingers, are more prejudiced. Nevertheless, some researchers were questioning this assumption and showed that both rightists and leftists might be prejudiced but toward different groups. Research presented in the following paper by Gabriela Czarnek, Paulina Szwed, and Małgorzata Kossowska showed that both rightists and leftists are not free from biases and negative sentiment toward those with whom they disagree. This is because people who hold different beliefs question our worldviews and prejudice against them might be a way to restore the validity of their own beliefs. In these studies, however, rightists seem to be slightly more sensitive to the value violation than left-wingers.
Check the paper in European Journal of Social Psychology, full version available >>here<<