its not right him doing that but perhaps he knows he was a bad father but doesnt want to believe it, hes trying to blame you for the things hes done because he is too ashamed to admit that it was really him that did wrong.
i dont know how much of what i said made sense or helped but thats just my outlook on it.
it doesnt make what hes doing right and i know it hurts but you might have to ride with this one and it may eventually blow over, dont take everything he says to heart, i know its hard but its what youve got to do.
you know we are all here for you if you need us