Originally Posted by tiassa
Yes Louis is the Commodore, and IIRC Gillian suffocated him in his bed (not that she wasn't justified in doing so!), so between that and also killing the Commodore's son I suspect he felt that there was some payback due)
so he did it for his friend...good enough...
however, she slapped the crap out of him in bed (when he was still sick from the stroke) but did not kill him. Jimmy killed him in the living room (at her urging, but still...).
Also, she did not kill Jimmy...Nukky did that. And Uncle Junior knew she did not kill Jimmy and that the boy in the tub was someone else (he even hired the Pinkertons to prove it!).
So I agree with you that he did it for the Commodore. But the reasons you give were all wrong!