I could be way wrong and someone may have a better idea about it but I think it has to do with the fact that before himi was resurrected he belonged to someone else and wasn't Genma's completely so when the time came Himi sacrificed himself basically so that he could be resurrected as Genma's and Genma being Genma didn't really understand what Himi did and why. Again I could be way off on this whole explanation and someone should correct me if I am but that's the way I interpreted that whole conversation.
when himi was resurrected..what does asari mean when he yells at genma for not understanding of what himi wants??