> if you are pulled over, you roll down your window, keep your hands on the steering wheel, look straight and answer "yes sir", "no sir".

This is just common courtesy? I've always acted this way, and never had bad experience with the police, because I treated them with respect.

Sounds like your GF showed a lack of couresty/respect for the officer's safety and got treated like a threat as a result.

That's not racism. That's an officer protecting himself from an unknown quantity.

>you will never understand their point of view.

Because every human being is completely devoid of empathy...