She responded just as politely as he asked. "I'm in my car why do I have to put out my cigarette?" To which he responded "Well you can step on out now" instead of anything about why she should put it out, such as it being for his benefit. After that is when the ranting about it being her car started.

9:20 in this video https://www.youtube.com/watch?t=560&v=yf8GR3OO9mU

While I agree knowing her rights certainly didn't work to her advantage in this situation. Your interpretation of events is not what I consider correct, and mine may not be either. I would encourage other people to watch it and determine for themselves what was ranting and what was polite.