You see. That's what makes us great! Despite how bad we feel about what we did to Native Americans, what we did to African slaves, what we did to Irish immigrants, eastern European immigrants, Jews, Italians, and now Hispanics, we are NOT like the rest of the world. By and large we have gotten past bloody conflicts over ethnicity. We just ask you assimilate on a basic level. Not so with many other countries in the world. Look at what's going on in even a place so "progressive" as France. Look at Africa where "tribes" still cut each other's heads off with machetes. Insert country and ethnic group here. Shiites, Sunnis, Serbs, Tamils, Pashtuns, Tajiks, Kurds, Georgians, Chechnyans, etc. Sure we still have biases and arguments. But we are nothing like many other countries. Other countries see our diversity as a weakness because they can only compare it to their own. It has never been so. It has always been at the CORE of our strength.