Indeed, some of the suspicion regarding loyalties might have been planted during the Sino-Japanese war when "Issei" Japanese-Americans identified with nascent I

Indeed, some of the suspicion regarding loyalties might have been planted during the Sino-Japanese war when "Issei" Japanese-Americans identified with nascent Imperial Japan: https://www.jstor.org/stable/25591553 https://www.jstor.org/stable/25591553 Additionally, today, we have agencies who consider Americans enemies of the state, just not in broad strokes, though we do see some semblance when people try to paint certain segments of today's America as being unpatriotic or "divisive" in broad strokes.