@Lustig Andrei,
What that film reminded me of is the bigotry we suffered before, during, and after WWII. We looked like the enemy, so we were also the enemy.
Racial bigotry is blind; it's not rational by any standard of humanity. It's the "them against us" mentality that harbors great numbers of people to join in the hatred. Unfortunately for us, even the US government were bigoted, and identified us as the 'only' enemy living in the US. They put us into concentration camps for the duration of the war.
During the first Gulf War when many in the US attacked Arab-Americans, Japanese-Americans advocated for them.
Having learned the lesson of discrimination early in my life, I have become a champion of any group that are treated unfairly. This country is supposed to be the country of equality. According to our Constitution, "all men are created equal." We still have a long way to go.