I'm going to poke fun at my disabled friend.
Why would you make fun of them if they cannot help it?
Because I hate him for his complete inability to speak properly.
Making fun of someone with a disability is an awful thing to do. You shouldn't make fun of your friend just because he can't speak well. If you do that he'll probably feel bad about himself and then stop being your friend.
No, I'm going to tease him today.
I think that that is not fair. You should not make fun of someone that has a disability, it is crossing the line.