Dear Misunderstood Autistic

My following comments are not meant to defend your sister or her appalling behavior. Just placing another possible facet to the picture.

You said that she worked in the that same area of your disability. She may well now feel totally worthless because she failed see that her own brother had that disability, also working in an area is very different to living 24/7 with the situation ( My job was carer for over 20 years and now sole carer 24/7 for my father has dementia).

When we feel scared & worthless the default mode is often anger all of which means ones judgement is impaired.

Take care of yourself

Roberta