You are right to touch on disabled people, there used to be another attitude from decades ago, that use to suggest they should have been suffocated at birth or were being punished for sins in a previous life...
https://www.theguardian.com/football/1999/jan/30/newsstory.sport7
Whether it's race, disability or mental health, some attitudes still exist, that shouldn't exist, if you are not 'normal.' We have slowly changed the tide on racism and equality for disabled people. I believe mental health is still in the dark ages, as those other two aspects used to be, demonstrated by some comments on here, of those who also think it's some kind of a joke. People used to laugh at racist programmes in the 70's. These days we have people thinking MH is some kind of joke and you should be ridiculed if you dare speak out. I could imagine the uproar, if I had that attitude towards BLM.