@Mr.:
Treating nami, a human, as nakama makes him hypocritical. So I don't see how it's improbable that he would hypocritically lash out at Hacchi for siding with the strawhats. I just don't see how he would put aside his cruel beliefs about humans and want to punish someone who has the same dedication to his ideals just because his former supposed "nakama" was injured. I use the term nakama lightly too. Hacchi is no longer in his crew, he not only abandoned Arlong but also became an ally to the strawhats and severed his association with the Arlong pirates.
so you think arlong would be alright with hodi using a nakama as a shield, if so you need to go reread arlong park
and you can see it your way but I'm pretty damn sure arlong's a once a nakama always a nakama kind of guy, I don't really get your viewpoint for arlong I think your just looking at the cruel aspect of him not looking that towards his own race he's caring, you look to much into how treats humans as how he is as a whole, humans to them are like pigs are to us, there inferior beings that we don't put much care into and don't really get saddened when they die, except in there case the pigs are more numerous in numbers and try to suppress them
I think you have arlongs personality down wrong but that's just me, maybe other people agree with you, but I find it unlikely he'd cut down his First mate, be mad at him… Yes... scold him... Yes maybe even give him a nice punch but he'd still care for him just cause he'd gun down a human doesn't mean he'd gun down a fishman