For my Fact2, I simply point out there are very fewer black engineering students and as a result, fewer tech founders. I agree with you that it's a cultural problem. There is a research showing that recent African immigrants perform better than those whose have been in US for hundreds of years. So the problems are not inherent but cultural. My point is that Silicon Valley is not to blame for not having many black founders. The problem starts from family,part of the culture they have inherited and as a result, education and career they end up choosing.

"Where nice people meaning no offense will cross over to the other sidewalk and back, especially at night". I agree that this does happen. I'm guilty of that. But only when I see a group of black teenagers at night, and I might cross over and back without even thinking much about it. I don't know how to solve this problem. One of my black friend who went to Havard Law told me he is guilty of the same irrational fear when he is walking at night.