This is excellent satire. I'm surprised people are missing it. To anyone thinking it's real, look at how self reflective it is. No Republican is justifying that brown people are bad because "grainy video footage" told them so. The choice to include the word grainy is hinting that the people with that mindset are often poor. Those people are typically too busy trying to survive to consider that their media sources may be misleading them. Same thing with the radio told me when I was young example. They're calling out that this story has been told their whole lives, and we typically just accept what we learn in our youth as true.

Honestly, I could write an essay on how many things this satire is alluding to and how well it does it, but my lunch break is over.