Just another observation - this highlight is highly offensive, although you may not realize it. Comparing what you perceive as a "hostile Black person" with a Trump supporter, whose group stormed the capitol, hung a noose, and threatened to assassinate public officials, is by far not an equal match-up. This gives the impression that every Black person who for whatever reason chooses not to smile at you is hostile or a threat is what racism is rooted in.
I wrote an article series a while back entitled "Dear White Woman" that I hope you'll take the time to read. I specifically spoke about how Black women are considered inherently angry and how this racist trope is a destructive myth. Why would your assumption be that a Black person not smiling at you means they hate white people? Where is the rule that we, or anyone for that matter, should always be smiling? That's actually a sexist criticism often made to all women when we are told that we should "smile and be nice." Is that fair to protect this onto Black people?
I'm pointing this out not to argue, but to just bring this to your attention because how you meant it may not be how it is perceived.