100% agree with you on all levels. To attempt give my perspective on the question you asked:

Why are the major news networks mute to the facts and blind to the examples of race unity?

Short answer? Follow the money. More often than not most large media outlets have corporate leaders that are beholden to government. The media furthers the narrative that politicians set out for them. The narrative right now is meant, just as you mentioned, to divide us. It is a distraction. While we're all concerned about riots in the streets, they pass bills you'll never even know about. This is their intention: to limit your freedoms while increasing government's power and control.

I have a series on Freedom where I plan on getting into the peaceful solutions available through principles of freedom. Check it out.