Racists can find "overtones" in the dardnest places.
Did you read the one about the NAACP attacking Hallmark last week because they thought a talking greeting card referring to a “black hole” was actually saying “black whore” and was meant to be a racist slight? These people are race-obsessed, nutz, and dumb as posts.
As Mrs. RQSR has said often “If one wishes to be offended, one will be offended”.
The Blacks in government, and the race baiters such as Jackson, and Sharpton have about worn out the being offended crap.
This guy so offended by the tossed bottle cap is so pure and unbiased that he immediately began his spiel with race identity, and accusations of racism.
I’m just speaking for me, but he was IMO waiting for the opportunity to be offended himself, but had to settle for being offended for another black person instead.