You picked these moments out of context bro..., he was shown to be disgusted to see that women being sold he straight up he said so himself, he wanted to buy her to save her, like they were gonna buy caimie
As for jimbei, sanji thinks someone responsible for something even inderectly has to take responsibility for it, the first thing he said when he learned why his mother died is "she died because of me" the dude blamed himself for something that he didn't even do, before he was even born
Also jimbei messed up, the guy released arlong knowing what he was like, he's like someone who drove over a family, he obviously has to take responsibility