A virulent nationalism, tinged with bigotry, is on the rise across much of the world. It helped elect Narendra Modi in India and sustains Vladimir Putin in Russia. It has vaulted Marine Le Pen to the final round of the French election. She is the underdog in the runoff, but it’s chilling to see that this weekend she seems to have won voters under age 34.

In the United States, Donald Trump won the White House despite — and partly because of — his disdain for Mexicans, Muslims and African-Americans and his flirtation with anti-Semitic tropes.

In the face of this ethnic nationalism, citizens often face difficult choices. They have to decide how much of a priority to place on combating it.

Should voters eschew their favorite candidate and vote for one with the best chance to defeat the nationalist? Should policy experts be willing to work in an administration that plays footsie with intolerance? Should a museum dedicated to fighting hate, like the United States Holocaust Memorial Museum, host a hateful president?