Regardless of whether he's AS or not...telling your child things like that is just hurtful.
And what if part of it is true? I know that there are times when my father said very hurtful things to me, and some of it was true. I had to get over it and deal. I had to take responsibility for the parts that I had to. It didnt' make it easier to take the rest of it, mind you.
Who knows why certain parents behave as they do? I would never be like that with my children. I try and be supportive and understanding. And when they fail, I try and help them figure out a way to succeed. However, sometiems they don't want to succeed, so I must accept that as well.
Sometimes we put up resistance that frustrates others, and they get upset. I know this to be true. We also could use a slightly thicker skin.
Anyhow, just rambling here.