Growing up in the Southern US, I met plenty "Let's bomb all the savages in the Middle Easy and take their oil" types. Some of them grew up to be self-proclaimed Nazis.
I'm not sure I agree. Given that the area in question here is the southern United States, and considering that racism is alive and well there, indeed with people groups they have met (and who speak English), I'm not convinced that exposure to non-whites speaking Farsi will somehow fix their attitude.
These people are racist against non-whites living in their own communities, whom they have spent their entire lives with. Meeting a dark-skinned stranger in a turban is a chance for them to confirm and bolster their biases, not to reduce them.
And even if they go through some kind of traumatic experience with a stranger from the Middle East and call them friend, it wouldn't stop the racism. I know plenty of racists with "black friends" who will tell you all about how "there are black people, and then there are n**rs". Some of their black friends will even parrot this kind of propaganda.
