He's just one guy. You can take him. You can beat him. You can kill him, sure. If you really want to go that far.

But how will you find him? How will you get him before he just teleports away? Or teleports you into a lake? You've already fought him once. He knows what you're capable of, doesn't he? What makes you think he'll let you lay one finger on him, especially if Vash hurt him?

Think it through, Luffy!