Hi Tyrwhitt,
this was awful behavior
It is quite understandable that you want to tell him. And loudly so. But what would be accomplished by that?
When you are calmer your statements have more impact (SET). Possibly he knows that he did wrong, you are angry and feels guilty. And rightly so.
I don't want to validate his selfish reasons,
Why not? By acknowledging their existence they get squeezed down to their appropriate size in his mind and he can't hide behind them anymore.
I actually want him to feel abandoned in the way my dad has been (although he's managing well).
Is revenge in any way making the pain of your dad go away?
How are you doing at the moment?