From Horne’s bio:

Horne was born March 28, 1945, in Montreal, Quebec, Canada to George Marcus and Ludwika Horne who had immigrated to Canada from Poland in fear of German invasion in the late 1930s. Horne became a U.S. citizen at age 9 when his parents gained U.S. citizenship in 1954. Most of his parents friends and extended family did not leave Poland and died in the Holocaust. As Jews, his parents escaped this fate by moving to Canada.

How anyone of Polish and Jewish heritage, whose immediate family was DIRECTLY affected by the Holocaust can even fathom language like “[This] is part of a civilizational war. He determined that Mexican American Studies is not based on Greco-Roman knowledge and thus, lies outside of Western Civilization.” is simply beyond mind-blowing.