No I think it's because a few chapters ago in the flashback although when Sideburns commanded his people to go kill the old man that adopted Marco, he told them to let the kid (Marco) alive.Can't believe Marco is trying to avenge Sideburns, especially after everything he did to him and Baku earlier. Maybe it's because he knew by instinct that Caracal is the biggest threat he needed to neutralize? Or a testament to how pure his soul is? Maybe it's that thing that people call "a man's pride"? Either way, I'm rooting for you, Marco.
Thats why Marco feels gratefulNo I think it's because a few chapters ago in the flashback although when Sideburns commanded his people to go kill the old man that adopted Marco, he told them to let the kid (Marco) alive.