Saving C or sinking me?

I have a brother with a 2 year old daughter. Recently he told me our Dad was his role model.

This concerns me. I love my Dad. But he is no role model.

My brother spends his off hours on a barstool, trading the intimacy of his loving wife and baby girl for weaving narratives in which he is always the central figure of every story. He tells me our Dad is a great man. He then guns the truck through a red light and I tell him to pull the car over.

My brother also doesn't listen. He will find a way to make any story about himself. This isn't about him. Not yet.

My father was so amazing that when the school came to him and told him I had often been in the unsupervised company of a child molester with an underage prostitution and porn ring, he did and said nothing. When I asked him if he went to the meeting, he said yes.

That was it.

My niece deserves better than my brother gliding through life in his own drama and not seeing what is happening with her, around her. Of course the only way for me to do this is to tell him, and show him the proof. If I do that, he will bring it up to my Dad.

Family is a messy business. And am I doing this for the right reason? Does it matter?