What if the person driving the civic who cut you off was an asian female? Admit it, you would have some prejudice against certain type of drivers, maybe not so much on what car they drive, but their background, etc. That's how stereotypes exists. And as much as you can say "how other people ride does not reflect how I ride blah blah blah" in reality it does.
On another note, the other day I was at a red light in the middle lane, on the left tire track and a car pulls right NEXT to me in my lane. I looked back (it was an asian female btw) glared at her, gave her a hand gesture that said "wtf are you doing!" She couldn't make eye contact with me. The cagers on the right and left lane also gave her a dirty look shaking their heads. When the light turned green I sped ahead and stayed in the middle of the lane this time so she wouldn't cut me off in my own lane. Now whenever I see asian female drivers, I stay the hell away from them.