What is the experience of hating a group all the time because of an individual?

Normal! When I meet an arrogant Frenchman, I will think, how arrogant the French are! When I encounter fraud in Italy, I will think, Italians are crazy! When I meet boys, I think boys are all lower-body animals. But any group will have scum and elites, and any scum or elite may become the representative of this group, but in fact they cannot represent the majority of this group. Because an example hates a group. If it was that moment, it would be normal, indicating that you were angry. I believe that when you are calm, you will not stay in a state of hating a group because of an example.