I don't know where to express this opinion without being stabbed in the neck so I'll do it quietly in this comment section. But personally, I think it's just basic logic and mathematics.
You say you are the only Black guy in the office, and you're framing that as if it is an important issue. Based in Seattle, your race makes up only 7.5% of the population. The population of office workers is ~35%. Now, 7.5x0.3 = 2.25% of Black people in the office. I take it there are only 25-100 people in any given office. Now make that 2% of Black office population in a 50-person office, you're going to be the only one.
I'm sorry you feel the way you do and that people are rude to you and make you feel segregated because of your race. I loved your Black History Month article and I can get behind the fact that there is systemic oppression of African Americans. It's wrong. Systemic oppession and low funding in Black neighborhoods is a real problem and that also contributes to why there maybe aren't as many Black people working in offices. I think we should stick to the facts, not try and spark moral outrage based on fallacies. It hurts your situation and gives people a reason to roll their eyes. Don't give them that reason.