having brown skin is not probable cause. You think it is great now when it is your party doing the profiling, you will be less happy when the other party is doing it.
Having brown skin isn't what prompts cops to profile for non-citizenship. I'm half-Hispanic, and am rather light skinned (especially in the summer when I stay indoors a lot.) But I've been checked for citizenship, when I and friends were talking Spanish, and mentioned the names of other countries. This gave the bilingual cop reason to question us.
Your idea of race being factor is a deliberate distortion promoted by Democrats, for whom the flashing of the race card is a way of life, and promoted every day on liberal media. You all probably have no idea how silly you look.
And as for "the other party", what is it that they would do ?