You covered a lot, most I'm simpatico with though I think you fall well short of what's behind "rebellion", both collectively and individually. Though you no doubt mean well, you severely over generalize the motives behind individuals (black NFL athletes for example) actions, over simplifying and under estimating what there is to be angry about about this country. The individual reasons are legion, not just racial. Racism is just a free pass that allows our collective conscious to ignore the other root causes. I think MLK had it about right when he categorized our ills into poverty, racism, and militarism. I would add one more thing and that is runaway capitalism which serves as the life blood for this unholy triad. IMO it's actually greed, love of money and not money itself, that fuels rebellion at the collective level under the guise of proletarian values co-opted by different pirates who just want to get their piece of the pie  by feeding off of the commonweal carcass.