I will come back to this as I think on it more - but I've been thinking on the similarities between the history of people who have disabilities and who are originally slaves from Africa.
Both have been taken from their communities of origin to live far away
Separated from the families they love
To work for no pay
Raped and abused by the people they are entrusted to
Forced to give up their children, be sterilized, and to abort
Not be allowed to learn
Considered less than fully human
Disenfranchised to vote
Not permitted to sign contracts
Not allowed to marry
Given substandard, if any, health care
I'm sure there are more.
The difference I see is that far too little of this has changed for far too many Americans with disabilities, while all of it has changed for the (eta) nondisabled descendants of slaves.