In the grocery store there was a late-30s white man with his son who was less than 2 years old, the boy was sitting in the front basket part of the cart dad was pushing. Not to be unfair but dad looked like a poster boy for a Trump supporting, -ist, bigot; he was pasty, chubby and sneeringly angry.
I was searching for a steak for mother and was out of my element having never eaten a steak in my adult life. The man was looking as well and I seemed to be constantly in his way or, something.
A jovial elderly black gentleman walked up and immediately noticed the giggling boy. It was as if they were old friends. The older gent told the boy how handsome he was and the boy squealed and reached for the man to pick him up. The dad turned purple. If he were a cartoon he would have exploded. The older gent told the boy that he had to go, the boy smiled and waved. The dad looked faint as the man walked away.
Not to miss a great opportunity, I waited until the man with the kid pushed his cart a bit further. I walked up to him and told him that I saw him at the steak case and asked if I could ask a question? I went on to ask if I had purchased a "good" steak and what would he recommend? He was a bit stunned. His eyes said, "Damn, another one. How am I going to hate you people if you're so nice?" He recovered an offered his recommendation.
Kill them with kindness.