Deplorables grew furious as amnesty Democrats and especially corporate Republicans preached about the values of open borders and unchecked illegal immigration—but never quite experienced first-hand the effects their policies had on distant others. Influential advocates of lax border security tended to put their kids in private schools, lived in mostly apartheid communities, saw illegal aliens largely as cheap labor and personal servants, did not have any personal desire to live among, befriend, tutor or mentor those they championed—and assuaged their guilt by blasting their own fellow conservative with charges of xenophobia and nativism.
I once experienced a lot of Republican orthodox disdain when I wrote Mexifornia in 2003 and discovered how unabashedly some elites believed that cheap labor should trump worries over routine lawbreaking, static wages of entry-level American laborers, and the impediments that that mass illegal immigration posed to the melting pot of assimilation and integration. In some sense, in 2003 the editorial position on illegal immigration of La Voz de Aztlan and the Wall Street Journal were almost indistinguishable.
The deplorables were further enraged about national security that was never defined as predicated first on American interests abroad and at home.