Please don't use that card for whatever difficulties you might encounter. I am also an 'immigrant' or was (when is someone not an immigrant anymore?), and I never had a problem neither during my training or finding a job or keeping a job. If you are respectful, polite, courteous (basically how any human being should be), you won't have a problem. Get the right attitude, don't blame your instructors if you don't perform well, look at yourself in the mirror, correct the situation, work harder. I knew a guy who was such a bad pilot, but thought everyone was a racist and used this excuse as the reason why he was not successful....pathetic.