Vox Media reporter Jenée Desmond-Harris writes about the white teens who responded to racist comments by white adults in McKinney and who recorded the action once the police arrived and posted it on Youtube.  “Outside of the context of American racism, what the kids did wouldn’t really be a big deal: they saw that other kids their age were being wronged, and they told the truth about what happened. But against the backdrop of a society in which many adults both perpetuate racism and go to great lengths to deny it, their reactions stood out.”