History has shown that Islam can be a unifying force, bringing people of diverse backgrounds together as brothers and sisters in faith. How do the teachings of Islam rid people's hearts of racism?
Islam is not a racist religion, nor does it preach racism. The peoples of other faiths have always enjoyed religious toleration under Islam; when the Jews were being persecuted in the rest of Europe, they found freedom and sanctity in Muslim Spain. Their historians regard that as one of their Golden Eras.