Deconstructionalism versus New Critism

A while ago, my english teacher showed us examples of how to interpret texts. She told us to stay away from deconstructionism; it was supposed to be too challenging for us and hard to understand. I kind of took this as a challenge. Deconstructionism actually plays a huge role in Sailor, given the fact that the main character found virtually no meaning in the trivialties of life. Although the author builds Noburu as a character capable of the immoral act of murder, one cannot assume that Noburu actually murders Ryuji. The ambiguity of novels cannot ever be accurately accounted for; character behaviour is far too varied to be quantifiable. This is where a fundamental question arises, did Noburu actually murder Ryuji? Deconstructionalism tells us no. New criticism tells us yes. I guess that's what makes different lenses so powerful. Choice.