Is there a good way to handle being someone's verbal punching bag? I really just can not stand that sort of behavior! Even if you are right someone being attacked like that you feel like you lost.

Which I guess is why your Dad rubs me the wrong way every once in a while. And I would hazard a guess my distaste for that kind of thing comes from the fact my brother is the same way (though not about computers) only a whole metric tonne worse, any time that he is confused by something or feels like he is losing control of a conversation or just generally if he's pissed off he starts in with calling everything stupid and lashing out at who ever is handy verbally... did I mention my intense dislike for my own flesh and blood?