I just wanted to highlight this twitter thread (with permission), which makes many of those arguments, but also emphasizes a key fact - Emmett Till was disabled.
When I was doing research on disability and intersections, I came across something I'd never learned about the Emmett Till murder.— Krisandry Harridan (@KHandozo) January 27, 2017
Many of the victims of racist violence in our nation's history turn out to also have been disabled, because oppressions magnify and multiply.Namely, that Emmett Till's speech was affected by his bout of polio, so his mother taught him to whistle to clear his passages to speak.— Krisandry Harridan (@KHandozo) January 27, 2017