How might I open such conversation? I could say:
Remember that thing you said about my request for a pet barrier being found only in cop cars? Well, I think that was indicative of unexamined recordings of racism and I’d like to hear you into action against any such remarks in the future. What was your life like growing up Mexican American?
What are the chances that the car salesman would hear anything I said after that? Better yet, what are the chances he’d hear any fraction of the species-level-love-as-course-correction that motivated my bringing it up again?
I am strangely encouraged by Oswald Chambers’ devotional in this matter.
Whenever the Holy Ghost sees a chance of glorifying Jesus, He will take your heart, your nerves, your whole personality, and simply make you blaze and glow with devotion to Jesus Christ.