BIFF thinks that 15yo autistic son is the cause of a lot of problems in our relationship. Admittedly, having a disabled son makes life more complicated, but...

What I haven't yet told BIFF is that he's got it completely the wrong way round.

If BIFF didn't treat 15yo so badly, I wouldn't think so little of BIFF.  

I can't respect someone who can throw disability related insults at a child. I repeatedly tell BIFF he shouldn't say that 15yo is thick, or say he's stupid, or say that he's acting like a spaz. 

It's insulting enough for an adult to say those things to a "normal" adult, and its horrible to say them to a normal child, but to say them to a disabled child is unforgivable. 

Even saying it about a child isn't good, let alone actually saying it *to* the child like BIFF does.