Commentary This week in San Francisco, students posted hateful comments about blacks and Jews on a virtual bulletin board that was specifically set up to combat racism, right after a schoolroom lesson on anti-racism. Teachers and parents were rightfully upset. Statements from the school district said that school officials were “unclear how this happened” and were “investigating the issue.” With any common sense, school officials and teachers should not have any question about why this happened. In the 1960s, blacks were told repeatedly that they were inferior to whites. They were forced to attend certain schools, sit at the back of the bus, drink from “colored only” water fountains, were kicked out of “white” nightclubs and restaurants, banned from employment at certain businesses, barred from living in certain neighborhoods, and denied access to many opportunities that were afforded to white citizens and even to minorities who were not black. This …