Your teacher friend is a useful idiot. Tell him that for me. Then explain that a useful idiot is someone who makes excuses for a totalitarian regime by spouting their propaganda... because your “teacher” friend surely hasn’t a clue about history, human nature or despotism.
Acquaintance, not friend. I can not be friends with someone who has so little use for the values of this country. That may make me a bigot, but there it is.
I feel sorry for the US children he used to teach.