I agree, Kizaru is Luffy’s admiral (battle of the monkeys 🐒) and the fight with his superior is inevitable. Fujitora and Ryokugyu are so tailor made for Zoro and Sanji it’s damning. It doesn’t really matter that Fuji is a good guy that likes the Strawhats, he turned a “blind eye” so he can have pirates removed from government employ. Look at characters like Garp, he’s a faithful marine through and through and hates celestial dragons, same with Smoker. Coby is literally Luffy’s number 1 supporter and he’s still resolved to want to capture him. I don’t see why Fuji would have to leave the organization he just joined or just straight up not fight them seriously. When it comes down to it he’s going to fight alongside his fellow marines when a large fleet of pirates come wreaking havoc, regardless of his feelings towards them, regardless of his hate for celestial dragons. He could turn a blind eye here and there but there will be times when he can’t.