Sorry I've not posted this promised comment on disablism earlier.
The truth is I nearly forget. Which is quite apt, because the biggest problem for the disabled I would suggest is that their feelings about and contributions to society are largely overlooked. Mainstream society tries to forget that the disabled exist, whether intentionally or not. This is to do with a number of factors, but the main one is that they are an economically disadvantaged group and anyone who falls into this category is generally ignored by society to some degree except when they are a threat to those at the top.
My advice is, equality is something we all have to fight for, continuously. For each minority that is discriminated against that doesn't directly affect us, the closer the time will come when it is our turn. We all benefit by treating our minorities well.