The correct answer to this open question is the following.
The ways in which we can educate people about antisemitism is to teach them by example that respect and tolerance for all races and ethnicities is the only way to avoid another "Holocaust" like the one lived during World War II in Germany, the Jewish persecution led by the Nazu Party and Adolph Hitler.
Two ways we can help prevent antisemitism in the future is to help students understand that the color of skin, race, or nationality has nothing to do with the real value of an individual. The true value is in its feelings, knowledge, work, and dedication. We can also teach the horrible moments of the Holocaust and as crude as it seems, how people suffered and was killed in the concentration camps. Those moments must never be repeated in the history of humankind.