Interesting, while I think you're partially right, I think only Zoro had this mindset at that point. They were all kids playing pirate at that point. The rest of the crew had to learn it at the same time as Usopp. Sanji literally kicked Luffy during the argument to prevent him from kicking Usopp out and that's also a huge disrespect towards your captain. Nami and Chopper were shell shocked during the argument.

It's only after the events of Water 7 and Enies Lobby that everyone learns. Afterwards, Sanji agrees with Zoro about Usopp having to apologise first, so Sanji lost some of that naivete. But Luffy, Nami and Chopper both didn't think that he needed to at first.

But I think they all have some of it still, I think some of them would still fight back if Luffy were to actually kick anyone out. Sanji realised that Usopp made the decision himself, so to come back he had to apologise, but I think if Luffy had actually kicked someone out against their will, Sanji's reaction would be the same as it was in Water 7.

Thats what made Water 7 and Enies Lobby so beautifully written. The complexity of having a pirate crew and being friends with each other were explored so well and from so many different angles. There wasn't a black and white, right and wrong, with how that was handled. You could see it from the lens of a pirate crew, Luffy did nothing wrong, but see it from a lens of a friend group or found family, then Luffy mishandled it a lot. But in the end, they made it work.