Lucci almost made Nika who is always laughing, damn near cry.
That is maybe the most serious nika can ever visually get and Lucci got him to do it.
Also Luffy entered G5 after witnessing this
There is no bigger crime in Luffy's mind than attacking/killing someone who fed him, this has been a thing the entire manga. He seriously fought Zoro his RHM over this, he sees red when that happens, which in verse can also explain why he jumped directly to G5 without a second thought.
Also you are pointing out those G5 scenes like Luffy didn't use Kaidou as a jumprope and his eyeballs like launching pads.