Wow, that certainly was a lot of destruction. Anyway, I think Kazuku underestimated Naruto and that's why he was tricked. Yes he was a badass super ninja, but with all that power and skill comes confidence. So when a loud mouthed simpleton comes at him with a cheap trick he figures, oh this kid is just a dumb one step thinker and I can easily beat him by planning another step ahead. However Naruto has thought further ahead than it appears as he expected that Kazuku would see through the shadow clone ruse if he tried it again. Thus Naruto technically outsmarted Kazuku by taking advantage of Kazuku's ego and letting himself seem like an idiot. Of course this isn't Shikamaru level strategy or anything but it at least shows, once again, that Naruto part 2 actually thinks a lot more in his battles rather than his old method of throwing chakra at the problem until it went away.