Although it was unsuccessful, the Crusades introduced Europeans to the luxury of the Muslim civilization. When the Crusaders brought home silks, porcelain, spices and other goods, demand for these things in Europe began to grow, especially as the emerging bourgeois class of Europeans became a market for these luxury goods.
It granted citizenship and equal civil and legal rights to African Americans and slaves who had been emancipated after the American Civil War
Nazis and Fascists both believed that what they were doing was for the betterment of their country.