THE COURAGE OF TRUMPBOT CONVICTIONS:

Tucker Carlson went on his prime-time Fox News show in April last year and told his viewers not to be fooled. The thousands of Central Americans on their way to the United States were "border jumpers," not refugees, he said. "Will anyone in power do anything to protect America this time," he asked, "or will leaders sit passively back as the invasion continues?"

When another group approached the border six months later, Ann Coulter, appearing as a guest on Jeanine Pirro's Fox News show, offered a dispassionately violent suggestion about what could be done to stem the flow of migrants: "You can shoot invaders."

A few days after, Rush Limbaugh issued a grim prognosis to his millions of radio listeners: If the immigrants from Central America weren't stopped, the United States would lose its identity. "The objective is to dilute and eventually eliminate or erase what is known as the distinct or unique American culture," Mr. Limbaugh said, adding: "This is why people call this an invasion."

There is a striking degree of overlap between the words of right-wing media personalities and the language used by the Texas man who confessed to killing 22 people at a Walmart in El Paso this month. In a 2,300-word screed posted on the website 8chan, the killer wrote that he was "simply defending my country from cultural and ethnic replacement brought on by an invasion."

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