Words twisting knives

My father is hurt. So very hurt by words my brother has used about him. Such hurting words.
He's going berserk. He's suspicious of them thinks they are trying to show off how good they are
He's becoming a very bitter young man. Can't see the light side of things
For my parents it's so painful for they have only ever shown love to them.
They need to stop seeing them for awhile. It's his loss.
But... He's my brother. I love him. They still love him even after all the hurt He's caused. But they need to love from afar. Such a rift. They may not speak with one another again for awhile.
My brother. He needs help. But he needs to see he needs help first. If words could kill.... my dad and mum started wondering why they were even living! No parent should have to think things like that.
I have hurt them terribly too before. Recent years have been better mostly after i have had kids. Can appreciate them better i guess. I tell the kids to love them.

I dont want aishu to go near them. They resent her for she shows off to them the difference between deepa and her..

My parents love deepa. Theu feel guilty at not spending time with her. So they go as often as they can. They feel if they speak to her more she will speak more. He wants to do as much as he can for her. But my bother misconstrues all this. He is unable to see their good intentions. He's dealing with surfaces constantly. He's not even going deep into his own emotions. It's a bit scary.

He's gone crazy thinking about autism like its a bad word! He's using it to accuse my dad! Autism is not an accusation. It's a condition!!!

And he can't stop blaming people for things. He's never really learned to stop and take responsibility.

When he crashed the car the car was faulty he was faultless. When he failed his driving test it was coz the instructor was biased. If he had been a girl woth a short skirt he would have passed. That's what he said!
When he didnt follow up on the girl he liked it was my parents fault for making him think he needs an arranged marriage
Now his daughter might meed intervention and it's my dad's fault for passing on autistic genes to her.
How did he come to this???