By Philip Pullella VATICAN CITY (Reuters) - Pope Francis on Saturday said an "epidemic of animosity" against people of other races or religions was hurting the weakest in society, as he struck a note of caution against the rise of populist nationalism. Little more than a week after Donald Trump was elected the next U.S. president, buoying anti-immigrant parties in Europe and elsewhere, the pope said people should not be seen as enemies just because they were different. "We see, for example, how quickly those among us with the status of a stranger, an immigrant, or a refugee, become a threat, take on the status of an enemy," Francis said at a ceremony to induct new cardinals.