President Donald Trump’s executive order curbing immigration to the U.S. during the coronavirus pandemic is his latest attempt to cast immigration as an unmitigated economic and cultural disaster. The first claim is incorrect. The second reflects an odious, blood-and-soil conception of American nationhood.

The government of Prime Minister Kyriakos Mitsotakis, whose right-wing New Democracy party won last summer’s Greek elections in a landslide, has wasted little time adopting a new hard-line migration policy. Mitsotakis told Parliament in November that from now on, Greece would welcome “only those we choose.”

Amid a growing perception that immigrants are taking away jobs and eroding the city-state's cultural identity, immigration to Singapore has emerged as a hot-button political issue.